Later, this person sent me a private letter and asked me for advice. When I saw the private letter, I replied to him in time, although I didn't answer his questions in time in the paid consultation. But I also answered it for free in a private letter, and it didn't disappoint.
The first time I met the opportunity to realize cash in Zhihu, I lost it, but I was not discouraged. There will be such an opportunity in the future.