Cheng Nanqin and Yu Jirui were in the same class from elementary school to junior high school. After entering high school, Cheng Nanqin transferred to Beijing to go to school, while he was still in Guangzhou. In her senior year of high school, Cheng Nanqin had to work hard before her mother agreed to transfer to Guangzhou. (Their mothers are also good friends, so they can be considered childhood sweethearts)
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