 Xu was sued in 2019 for calling tai chi "grandmaster" Chen Xiaowang a fraud, and the Chinese court ordered him to pay Chen approximately US$60,000 in damages and to apologize for seven consecutive days on social media.Additionally, his social credit rating was lowered to the point where he could not rent, own property, stay in certain hotels, travel on high speed rail or buy plane tickets.The restrictions were lifted after he paid US$40,000 in both legal fees and the cost of placing the apology.