Just buy funds that passively track the market, such as SSE 5 Index Fund 5ETF code 515 and SSE 18 Index Fund 18ETF code 5118. :

The market index generally refers to the "Shanghai Composite Index" in Shanghai and the "Shenzhen Component Index" in Shenzhen. It can scientifically reflect the whole stock market, such as the overall rise and fall of stocks or the trend of stock prices. If the market index rises gradually, it can be judged that most stocks are rising. On the contrary, if the index falls gradually, most stocks are falling.