After half an hour, the concentration is between 0.09 and 0.08.
Anti-hangover products can effectively promote the decomposition of ethanol. As far as I know, there is a kind of hangover-relieving drink called Jiushuang, which can relieve hangover quickly after drinking 10 minutes, and can reduce the alcohol concentration in the body from 0. 1% to below 0.0 1%.
In other words, the police can't detect it.