[2021.12.16 追記]Applications filed by an entity listed in the Show Cause Order issued to Abtach Ltd., 360 Digital Marketing LLC, and Retrocube LLC on November 3, 2021 have been suspended. These entities are accused of committing fraud on applicants and the USPTO. Be suspicious of requests for additional fees; the USPTO does not require fees to respond to a show cause order.
On December 10, 2021, the United States Patent & Trademark Office (USPTO) issued a final order for sanctions against Yusha Zhang and Shenzhen Huanyee Intellectual Property Co.,
情報源: USPTO: Yusha Zhang & Shenzhen Huanyee Intellectual Property Co Sanctioned