Young Chinese people have created a new dating trend called “ex-partner referrals” in which they treat former lovers like job candidates. The young people share detailed profiles, personal feedback and previous relationship “usage reports” with strangers online to help navigate the risks of modern dating. The trend reportedly began on social media after a viral post asked for an “internal referral” for a boyfriend. The viral post read: “Can any sisters refer me to their ex? I really do not...