According to NTD, Yang Xiao is a former Dabai man, he is from Tongxu County, Kaifeng, Henan. Dabai, or Big White, refers to volunteers wearing white personal protective suits, who work with authorities during lockdown. One time, he found the employment agency was recruiting Dabai, so he applied and worked as Dabai until the lockdown was lifted. He said that Dabai's life during Shanghai's lockdown was very hard.