Caiyeji is a Chinese language reference for readers learning to read United States company filings and understand exchange traded funds. The site groups its explanations by topic, including trading rules, fund structure, company reports and valuation measures. A guide to bond funds shows why a regular bond ETF does not have a single date on which the whole portfolio returns principal. A separate guide uses a Microsoft annual report to explain the difference between goodwill impairment and cash flow. Readers can also learn what happens between an ETF liquidation announcement and the eventual cash distribution. The publication is designed for readers who want definitions and examples they can consult alongside original documents.