China’s patent applications have grown rapidly in recent decades, as shown in the chart. Chinese applications surpassed US applications in 2010, reaching over 1.4 million in 2021. According to this data from the World Intellectual Property Organization (WIPO), China’s applications accounted for more than half of the global total in 2021.
as with their scientific paper mills, China produces quantity, not quality.
https://www.ft.com/content/32440f74-7804-4637-a662-6cdc8f3fba86