There’s no need to use some stupid Chinese external app to pay because the US went cashless back in the 1980s with the prevalent usage of credit or debt card used to make purchases everywhere. Seems like you wasted your two decades in America, not understanding or absorbing anything going on around you that you didn’t know you could pay for carding. China is so god dam backwards that they completely did not have a phase where they use credit or debt cards. They used cash everywhere like cavemen all the way to the late 2010s around 2017-2018.. it was so bad also because they also had a rampant problem with counterfeit bills. Truly pathetic loser country. I’m from Southeast Asia and Even everywhere in Southeast Asia credit/debit card became the norm after 1990s.