After half an hour, the concentration was 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 anti-hangover beverage called Jiushuang, which can quickly relieve alcohol after drinking. 10 minutes 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