Siheyuan: Starting as a Chess Champion

The protagonist came out in Chapter 4, but in Chapter 6, I don't know anything and can't understand it at all. The protagonist is playing chess in a competition, and the scene suddenly changes suddenly. The time changes from 1960 to 2019, the location changes from the Children's Palace to a classroom in an unknown school (it seems to be a junior high school, there is no one else except the protagonist), and the character changes from the protagonist to a man whose name and age are unknown. (I also heard Xiao Yan, Murong Fu and several other names appearing in the exchanges outside the classroom, but I can't remember them). So I gave up, and you continue to watch 🤭

Look at the lakes and lakes painted on them