投一家公司前，要做哪些准备？

Core Insights - Most entrepreneurs lack a comprehensive understanding of the industry chain, which is essential for all investors to conduct thorough analysis [1] - Before investing in a company, it is necessary to deconstruct the industry chain, analyze the sector, and understand the roles and profits of upstream and downstream players [1] - By stepping back to examine the industry chain, one can discover answers to entrepreneurial challenges [1]