KNOWLEDGE NOTES

Knowledge Notes

Explore curated knowledge, course notes and methods, with their existing content and sources preserved.

This index lists complete English editions. Additional Chinese notes and bilingual updates remain available in the Chinese index.

350knowledge notes

Wang Kai's Collection of Product Failure Postmortems

A collection of product failure cases personally experienced by Wang Kai. Pivoting to Telegram within 6 hours after WhatsApp push failed, 4 pitfalls behind the FastFacts PH failure, fundamental differences between overseas IM ecosystems and the WeChat ecosystem, and an IM selection decision tree for overseas-bound products. Avoiding pitfalls saves more money than taking the right path

Product RetrospectiveFailure casesMarket selectionEnglish edition