In 1 episode, Hill mentioned "Tsinghua University ranked first in science and engineering in China"-Tsinghua University, of course, referring to Tsinghua University, and the location in the novel is the Imperial Capital, referring to Beijing; In episode 22 of the TV series, when I met my friends slightly in the game, a girl said, "Qingda brand, Peking University food, girls from Beijing Foreign Studies University, and Han from Beihang University". Qingda and these schools are clearly located in the imperial capital-Beijing, also known as Tsinghua, and of course they are homophonic "Tsinghua".