Read the business with two questions带着两个问题，读同一门生意
Imagine buying the entire home-goods shop. The owner says it earned 30. Before trusting that claim, find out what was sold, what customers paid, and what the business must keep spending. Then ask why customers choose it and what could invalidate that explanation. The accounts and the business story must constrain each other.假设你准备买下整家家居用品店。店主说赚了 30 万元。先查卖了什么、收到了多少、以后还得花多少；再追问顾客为什么选择它，什么证据会推翻这种解释。数字和生意故事，需要相互约束。
Buffett’s 1996 letter connects investing with understanding a business. His 2014 letter credits Munger with moving Berkshire toward better businesses. Their mature approaches overlap. The paired questions in this series are a teaching synthesis, not quotations, a rigid division of labor, or a reconstruction of private investment decisions.巴菲特在 1996 年股东信中把投资与理解生意联系起来，又在 2014 年股东信中把伯克希尔转向更优质生意的重要影响归功于芒格。两人成熟时期的方法高度重合。全文的两组追问是教学归纳，不是原话、固定分工，也不声称还原他们的私人决策。
One idea: Connect profit, assets and cash. Case · Apple FY2025 cash reconciliation本期知识点：把利润、资产与现金连成一笔账。真实案例 · Apple 2025 财年现金勾稽
We will learn in seven steps: connect the statements; estimate sustainable owner cash; explain returns on capital; examine incentives; map cash obligations; distinguish value from price; then write an evidence-based research memo. Each step ends with a real disclosure and a task you can repeat.学习顺序是：读通三表、估计可持续现金、解释资本回报、检查激励、排查现金义务、区分价值与价格，最后写出有证据的研究判断。每一步都对应真实披露和可复做的阅读任务。
Know which report you are reading先确认你读的是哪一份账
Download the annual report from the company’s investor-relations site or the exchange/regulator’s filing service. Read the business description, find the consolidated financial statements, and keep the notes and auditor’s report open. Earnings slides are useful orientation, but they often omit the reconciliation you need. The SEC’s guide to a 10-K helps locate these sections in a US filing.从公司投资者关系网站，或交易所、监管机构的披露平台下载年报。先读业务描述，找到合并财务报表，同时保留附注和审计报告。业绩演示稿适合了解重点，但常常没有你需要的勾稽明细。美股报告可以按 SEC 的 10-K 阅读指南定位这些部分。
Write four things at the top of your notes: reporting period, currency and units, consolidated or parent-only scope, and accounting basis. A balance sheet is a position on one date; profit and cash-flow statements cover a period. Compare a full year with a full year, and check whether a quarterly number is the quarter alone or year-to-date. Restated prior-year figures may differ from last year’s printed report.在笔记顶部写下四件事：期间、币种与单位、合并还是母公司口径、会计准则。资产负债表是某一天的状态，利润表和现金流量表是一段时间的活动。全年与全年比较，季度数据要分清单季还是年初累计；若上年数据经过重述，也可能与上一份年报印出的数字不同。
Consolidation brings controlled subsidiaries into the group accounts and eliminates transactions inside that group. A parent-only statement can instead show investments in subsidiaries and dividend income. Mixing the parent’s cash with the group’s profit breaks the analysis. In Chinese reports, also distinguish total net profit from net profit attributable to the parent’s shareholders when minority interests exist.合并报表把受控制的子公司纳入集团账目，并抵销集团内部交易；母公司报表则可能主要显示对子公司的投资和收到的分红。拿母公司的现金去对应整个集团的利润，口径就错了。中文财报里还要留意：有少数股东权益时，“净利润”和“归属于母公司股东的净利润”不是同一个数。
The three statements below are a starting framework. A complete report also includes changes in equity, comprehensive-income information where applicable, and notes on accounting policies and important balances. The SEC’s financial-statement primer explains why they must be read together. This series starts with an ordinary non-financial business; banks and insurers require different balance-sheet and risk analysis.下面的三张表只是入门框架。完整财报还包括权益变动、适用的综合收益信息，以及会计政策和重要科目的附注。SEC 财务报表入门指南说明了这些报表为什么需要一起阅读。本专题先从普通非金融企业开始；银行和保险公司需要不同的资产负债与风险分析。
One shop, one complete year用一家店的一整年，把数字连起来
Our fictional shop begins with no assets or debts. All amounts below are in CNY 10,000, so “30” means CNY 300,000. Goods are delivered and revenue recognized in this year. There are no returns, bad debts, capitalized lease assets or liabilities, VAT, other comprehensive income or dividends. Interest and income-tax payments are classified as operating cash flows for this example; follow the actual report’s disclosed classification when comparing companies.下面是一家期初资产与负债均为零的虚构商店。全文算例单位为万元人民币，所以“30”就是 30 万元。商品在本年交付，并于本年确认收入。为看清主线，暂不引入退货、坏账、租赁资产和负债、增值税、其他综合收益和分红。本例把支付利息和所得税列入经营现金流；比较真实企业时，须按各自披露的分类统一口径。
- The owner contributes 100 in cash; the bank lends 40, all due after next year.股东投入现金 100，银行借款 40；借款均在下一年以后到期。
- At the start of the year, the shop pays 60 for fixtures and equipment. Their annual depreciation is 6.年初花 60 买店内设施和设备，本年计提折旧 6。
- It purchases goods costing 50, pays suppliers 35 and still owes 15.采购成本为 50 的商品，支付供应商 35，尚欠 15。
- It delivers sales of 100. Customers pay 80; 20 remains receivable. The goods sold had cost 30.交付商品取得收入 100，顾客支付 80，还欠 20；卖出这批商品的成本为 30。
- It pays 20 for rent, wages and other operating expenses, plus interest of 4; rent is expensed in this simplified case.支付租金、工资等经营费用 20，另付利息 4；本例的租金直接费用化。
- Pre-tax profit is 40; the assumed 25% tax produces an expense and payment of 10.税前利润为 40；假定税率 25%，所得税费用与实际支付均为 10。
A sale creates revenue when the relevant earning conditions are met, not simply when money arrives. Here the goods have already been delivered: 100 belongs in revenue, while the uncollected 20 remains an asset called accounts receivable. Buying inventory is different again: of the 50 bought, only the 30 attached to goods sold becomes cost of sales; the remaining 20 is inventory at year-end.确认收入看的是相关履约条件是否满足，并非只看钱有没有到账。本例商品已经交付，因此收入为 100；没收回来的 20 暂时作为“应收账款”这项资产。采购存货又是另一回事：买进的 50 中，只有已售商品对应的 30 进入营业成本，剩下 20 留在期末存货里。
Profit: what was earned this year?利润表：这一年赚了多少？
| Revenue营业收入 | 100 |
|---|---|
| Cost of goods sold减：已售商品成本 | 30 |
| Gross profit毛利润 | 70 |
| Cash operating expenses减：租金、工资等费用 | 20 |
| Depreciation减：设备折旧 | 6 |
| Operating profit经营利润（未扣利息与所得税） | 44 |
| Interest expense减：利息 | 4 |
| Pre-tax profit税前利润 | 40 |
| Income tax减：所得税 | 10 |
| Net profit净利润 | 30 |
Revenue of 100 pays for sold goods costing 30, leaving gross profit of 70. The shop still needs rent, people and equipment: deduct 20 of expenses and 6 of depreciation to get operating profit of 44. Then pay for borrowing and taxes. Only the final 30 is the year’s net profit. This deliberately simple presentation is not a universal statutory template; real statements can classify depreciation within cost of sales or other functions.收入 100 扣除已售商品成本 30，毛利润剩 70。门店还需要场地、人手和设备：再扣费用 20 和折旧 6，得到未扣利息与所得税的经营利润 44；随后考虑借款利息与所得税，最终的 30 才是净利润。这是一张简化的教学表，不是统一的法定格式；真实报表可以把折旧按用途放进营业成本或其他费用。
Why deduct 6 rather than the equipment’s cash price of 60? The equipment provides service over multiple years, so part of its cost is allocated to this year. Depreciation is an accounting allocation, not a transfer into a replacement bank account. Whether replacing the equipment will actually cost 6 a year is a separate economic question for the next installment.为什么设备花了 60，利润表却只扣 6？设备为多年的经营服务，因此本年分摊其中一部分成本。折旧是一项会计分配，并不会自动把钱存进“换设备账户”。未来维持经营是否真的每年只需要花 6，是下一期要单独研究的经济问题。
The gross margin is 70 ÷ 100 = 70%; net margin is 30 ÷ 100 = 30%. These percentages describe this invented year. They do not establish a moat or an attractive valuation: you still need comparable businesses, several years of evidence and the capital required to produce those earnings.本例毛利率为 70 ÷ 100＝70%，净利率为 30 ÷ 100＝30%。这些比例只描述这个虚构年度，不能凭它们认定存在护城河或值得买入；还需要同行口径、多年证据，以及取得这些利润到底占用了多少资本。
The balance sheet: what remains, and whose claim is it?资产负债表：留下什么，又是谁的钱？
| Cash现金 | 91 |
|---|---|
| Receivables应收账款 | 20 |
| Inventory存货 | 20 |
| Equipment, net设备净额：60 − 6 | 54 |
| Total assets资产合计 | 185 |
| Supplier payables应付供应商 | 15 |
|---|---|
| Bank debt银行借款 | 40 |
| Total liabilities负债合计 | 55 |
| Owner contribution股东投入 | 100 |
| Retained profit留存利润 | 30 |
| Total equity所有者权益 | 130 |
An asset is a resource the business controls; liabilities are obligations, including the unpaid supplier bill even though it is not a bank loan. Equity is the accounting residual after liabilities. It is neither a separate pile of cash nor the price a buyer must pay for the company. In this simplified case, 100 of contributed capital plus 30 of retained profit explains equity of 130.资产是企业控制的资源，负债是企业承担的义务；尚未支付的货款虽不是银行贷款，也属于负债。权益是扣除负债后的会计剩余，既不是另一堆现金，也不等于别人收购公司必须支付的价格。本例中，股东投入的 100 加上留下来的利润 30，解释了权益为何是 130。
The equity-change statement provides this bridge explicitly. With dividends of 5, equity would become 125 and cash 86, while this year’s profit would remain 30. With other comprehensive income, share issues or buybacks, further lines enter that bridge. That is why “ending equity minus beginning equity” alone does not measure net profit.所有者权益变动表会把这座桥列出来。如果再分红 5，权益会变成 125、现金变成 86，而本年的净利润仍是 30。若还有其他综合收益、增发或回购，桥上还会多出相应项目。因此，不能只用“期末权益减期初权益”去代替净利润。
Cash flow: reconcile the bank balance现金流量表：把银行账户对起来
| Cash collected from customers顾客付款 | +80 |
|---|---|
| Cash paid to suppliers付供应商 | −35 |
| Cash operating expenses付租金、工资等 | −20 |
| Interest and tax paid付利息与所得税 | −14 |
| Operating cash flow (CFO)经营活动现金流量净额 | +11 |
| Equipment purchase (investing)买设备（投资活动） | −60 |
| Equity contribution and borrowing (financing)股东投入与借款（筹资活动） | +140 |
| Opening cash期初现金 | 0 |
| Closing cash期末现金 | 91 |
The bank balance is 0 + 11 − 60 + 140 = 91. The financing inflow explains why the shop has substantial cash even though operations generated only 11. Borrowing is cash received, but it is not revenue. Equipment purchases use cash, but the entire purchase is not this year’s expense. This is the key distinction between the cash ledger and the income statement.银行余额为 0＋11−60＋140＝91。经营只带来 11，账上却有不少钱，是因为还拿到了筹资流入。借款确实到账，但不是收入；购置设备确实出钱，却不把全部价款都当成本年的费用。这正是现金流水与利润表的关键区别。
We can also start from net profit and reconcile to operating cash. Add back depreciation because it reduced profit without a current cash payment. Subtract the receivable and inventory increases because they absorbed cash relative to recognized earnings. Add the payable increase because the supplier has not yet been paid. Opening balances are zero here; in a real report use the changes, not the ending balances.还可以从净利润反推经营现金流：折旧扣了利润却没有导致本次现金支付，因此加回来；应收与存货增加，把相对于已确认利润的现金占住了，因此减去；应付增加意味着还有供应商货款没付，因此加回来。本例期初余额都为零；真实财报要用增减额，不能直接套期末余额。
This small bridge works because the case excludes other adjustments. Actual indirect cash-flow statements can include impairments, deferred taxes, stock compensation, currency effects, and changes whose balance-sheet movements include acquisitions or other noncash items. Read the disclosed reconciliation before trying to reconstruct it by subtracting two balance sheets.这座小桥成立，是因为算例没有其他调整。真实的间接法现金流还可能包含减值、递延税项、股权激励、汇率等影响；资产负债科目的变化也可能混入并购或非现金事项。先读公司披露的调节过程，不要简单地把两期资产负债表相减，就认定算出了全部经营现金流。
Change the collection timing, keep the sale只改变回款，不改变这笔销售
Keep delivered sales of 100 and all costs unchanged. Move only how much the customers have paid by year-end. The remainder is assumed fully collectible later, with no impairment, interest or other timing effects. This isolates timing; a deteriorating customer balance would require a different analysis.保持已交付销售 100 和全部成本不变，只改变顾客在年末前付了多少钱。其余货款假定以后能全额收回，不考虑减值、利息或其他时间影响。这里专门隔离“收款时点”；如果客户欠款正在恶化，就不能沿用这个假设。
Collecting the receivable exchanges one asset for another: cash rises as receivables fall. Total assets and equity stay unchanged. Conversely, a shop can show the same profit while collecting less cash. A cash-flow shortfall is a question to investigate, not proof by itself of fabricated sales. Read customer quality, collection terms and later receipts.收回应收账款，是把一种资产换成另一种资产：现金增加，应收减少，总资产和权益不变。反过来，同样的利润也可能对应更差的回款。现金流跟不上，需要继续查原因，但单靠这一点不能证明收入造假。要结合客户状况、账期以及后来是否收到款项。
Check whether you can explain the numbers用三个问题，检查自己是否真的读懂
Why does buying another 10 of unsold inventory leave profit unchanged?再花现金 10 买入未售出的存货，为什么利润暂时不变？
Cash falls to 81 and inventory rises to 30. Operating cash falls to 1; total assets stay 185 and profit stays 30. No sale or impairment has yet transferred that inventory cost into expense.现金变成 81，存货变成 30；经营现金流变成 1，总资产仍为 185，净利润仍为 30。尚未销售、也没有减值时，这笔存货成本还没进入费用。
Does repaying 10 of loan principal reduce this year’s profit?偿还银行借款本金 10，会减少本年利润吗？
Holding interest unchanged, cash falls to 81 and debt to 30. Financing cash flow falls from 140 to 130; profit and equity stay 30 and 130. Principal repayment settles a liability; interest is the financing cost recognized in profit.假定利息费用不变，现金变成 81、借款变成 30；筹资现金流由 140 变成 130，净利润与权益仍是 30 和 130。归还本金是在清偿负债，利息才是进入利润的融资成本。
Can the owner safely take out all 91 of closing cash?账上 91 万元，老板能放心全部拿走吗？
The balance alone cannot answer. The shop still owes suppliers 15 and the bank 40, needs stock and future operating payments, and may face restrictions on distributions. A cash balance is not sustainable distributable earnings. Part 2 asks what can remain after maintaining the business.只看余额无法回答。店里还欠供应商 15、银行 40，需要备货并支付后续经营开支，也可能受到分配限制。现金余额不等于可持续分配的收益。第二期接着问：维持这门生意之后，究竟能留下多少？
Case · Find the same bridge in Apple’s filing真实案例：在 Apple 年报里找到同一座桥
Open Apple’s FY2025 Form 10-K, printed pp. 29, 31 and 33. Amounts here are USD millions. Net income is 112,010; operating cash is 111,482; closing cash and cash equivalents are 35,934. Locate each in its own statement before interpreting it.打开 Apple 2025 财年 10-K，印刷第 29、31、33 页。此处单位为百万美元：净利润为 112,010，经营现金流为 111,482，期末现金及现金等价物为 35,934。先分别找到它们在哪张表，再解释它们。
The cash account reconciles; profit is a different measure.现金账户可以对上，利润是另一种口径。
- 29,943Opening cash期初现金
- +111,482Operating cash经营净流入
- +15,195Investing cash投资净流入
- −120,686Financing cash筹资净流出
- 35,934Closing cash期末现金
Investing cash is positive because the category includes security maturities and sales as well as equipment purchases. It does not mean the equipment was free. Buffett’s owner perspective asks where the cash came from; Munger’s check asks whether that source can recur. Selling existing securities cannot be treated as recurring sales profit.投资活动为净流入，是因为这个类别既有设备支出，也有证券到期与出售。它不意味着设备免费。所有者视角要查钱从哪来，对解释的检验则要问这种来源能否重复。卖掉已有证券，不能当成每年经营都会赚到的利润。
Practice · Does closing cash measure this year’s profit?练习：期末现金能代替本年的利润吗？
No. Reconcile 29,943 + 111,482 + 15,195 − 120,686 = 35,934. Closing cash includes the opening balance and investing/financing flows. Net income of 112,010 is neither that closing balance nor the cash increase of 5,991.不能。29,943＋111,482＋15,195−120,686＝35,934。期末余额包含期初存量和投资、筹资流量。净利润 112,010 既不等于期末余额，也不等于现金增加额 5,991。
Continue with how much cash owners can sustainably keep.接着读第二期：利润里有多少能归股东。
