People in my country, especially some middle-aged people, often surf the Tiktok during their idle time. Many youths will also surf it, but some of them may dislike the Tiktok for some reasons. First, Tiktok uses its "recommend algorithms" and it seems that people are "confined" in the system they built themselves. Second, it leads to some uncivilized behaviors such as playing it without earphones in public like in subways. So lots of youths like me are willing to surf Zhihu. If someone wants to play badminton with me I will be happy too. I may also watch some interesting films if my leisure time is not so short.