[7][8] In August 2016, Cheng, together with fellow group mates Exy, SeolA, Soobin, Eunseo, Yeoreum, and Dayoung, teamed up with label mate Monsta X to form the unit Y-Teen, a project unit group that will be promoting as CF models for KT's phone fare service.

[17] On January 30, 2017, Cheng participated in the Idol Star Athletics Championships XIII, where she won a bronze medal during the rhythmic gymnastics segment.

[19] In 2018, Cheng was a cast member and dance mentor in the reality survival show Idol Producer.

[20] In November 2018, Cheng released her first solo song "If Love", an OST for online game Xuanyuan Sword which debuted at No.

Throughout the year, she was also cast as the main role in various dramas such as the Chinese e-sport romance comedy television series Falling Into Your Smile.