The full name of BBK Square Dance is: Purple Butterfly BBK Square Dance, also known as Purple Butterfly Square Dance, BBK Square Dance. It is a set of square fitness dance which is widely popular in the internet and folk. Stepping into the square dance is simple, lively, soothing and soft, especially suitable for middle-aged and elderly people to do fitness and entertainment activities. The founder named Shen Jiqun, whose net name is Zidie, is a staff member of Suichang County Statistics Bureau in Lishui City, Zhejiang Province. He is also a square dance enthusiast, director and coach of square dance. On 20 12, the step-by-step square dance was invited by CCTV to participate in the shooting of China National Fitness Dance Program. On behalf of the folk dance team, he boarded the CCTV program for the second time and became the first folk dance team to board the CCTV program.