"From January 1, 2022, all mobile and portable wireless charging devices produced, imported, sold, and used in China should not exceed 50W." This is said to be part of a document titled 'Interim Provisions on Radio Management of Wireless Charging'.
source https://timesofindia.indiatimes.com/gadgets-news/china-may-be-restricting-wireless-charger-wattage-in-smartphones-heres-why-it-may-affect-you/articleshow/85198816.cms
source https://timesofindia.indiatimes.com/gadgets-news/china-may-be-restricting-wireless-charger-wattage-in-smartphones-heres-why-it-may-affect-you/articleshow/85198816.cms