Ddinggu is a diamond brand. Its image creation prototype is "Bull Terrier", and its brand name comes from Li Chengjiu's perception that he is like a bull terrier in the crowd. He feels that too many social forms, cultural and educational differences and secular traditions are binding him, so he longs to be a bull's-head, be true, brave, pursue freedom and listen to his inner voice to live. This also coincides with Xiao Baiguang's belief, which contains truth and freedom, so that every young person can wear diamonds representing his unique personality, break the inherent rules of the secular world, and realize real diamond freedom and shine his personality.