How to do the right thing? Tell me in detail!

Men and women can only get 20 small ring tokens every day.

Then, the man groups the women (note: the man must group the women! The woman ran to find Xu Qingyi, and the man took the task last month. After that, the woman will see that Xu Qingyi has a task and the man is in Qinglong.

Answer the question: women choose B, men choose C, men choose wrong, it's okay, women will fail if they choose the wrong task.

Men and women talk to Xu Qingyi and Qinglong respectively. Women choose sincere locks and men choose sincere keys, so that women can gain experience. Then the man ran to the woman, and the woman dropped the lock and the man picked it up. The man went to Yuelao to hand in the task, and the task was completed!