Cǎihóng mófǎ

彩虹魔法 (Mandarin: Rainbow Magic, Pinyin: Cǎihóng mófǎ) is a Chinese My Little Pony The Movie promotional song, performed by Yuexin Wang, accompanied by his daughter Wei Yi Wang.

Reference: http://www.fk57.com/yulenew/dymusic/201801/00004876.html