But in China even street vendors take alipay or wechat pay, which have a record of all transactions.It's not at all apples to apples. The US counts everything real and imaginary in its GDP; it pretends every home-owner pays rent to himself every month. It puffs up education costs and hospital bills to push "growth" and is basically a man with broken legs pretending to be standing by inserting rebars into his pants which are the crazy amounts of stimulus payments. China, on the other hand, purposefully hides its real GDP so that it can remain a developing nation for as long as possible and in addition, its market is by nature, more hidden and less regulated as it has a massive gray market of untaxed cash retail transactions in the form of its vast street markets.
Basically, China is a man who is slightly shorter sitting down than a US that is standing tip-toed on 8 inch platform heels and counts his Marge Simpson hairstyle into his height. That's what happens when you have 2 parties trying to kill each other at elections every 4 years; everybody turns into a nutcase trying to look 10 feet tall to win.
By how much is China's gdp underestimated?