Brother Mao is a young lady in Tianjin. She has a sense of joy in Tianjin dialect and a domineering tattoo on her arm. She is called "light tank".

Brother Mao has 700,000 fans on the Internet, and publishes various auto repair parts on the Internet. He has his own garage in a treasure, with various parts. He will also try his best to experience the performance of the product from the perspective of users.