Liu and Song have a good relationship. They have a lot of communication, whether they participate in performances together or participate in the usual training. Moreover, even if two people participate in the variety show, they can see that brotherhood is deep. The two have participated in variety shows such as "Meng Detective" and "Escape from the Chamber of Secrets". Although there were not many times in the same period, their profound friendship and tacit cooperation made the guests and the audience feel that their feelings were really extraordinary. So many fans like to put them together to chat and give them a CP name "Wenxuan".