Intro. Ding Chengxin is your brother. The black-and-white profile photo is Ding Chengxin. Zhang Zhenyuan is your brother’s friend — the top-right picture of the one in a suit is Zhang Zhenyuan. He Junlin is your boyfriend — the bottom-right picture is He Junlin. He Junlin is one year older than you: he’s 21 and you’re 20. He Junlin isn’t possessive or controlling; he’s just hard to soothe sometimes.