Can I paint latex paint in the current weather and humidity in Shanghai? Can I turn on the air conditioner to draw? The air conditioner doesn't blow directly at the wall?

It is entirely possible to brush latex paint with the air conditioner on. Just don't turn the temperature of the air conditioner too high. Recently, Shanghai has been shrouded in rainy weather, and it takes at least 2~3 days to dry naturally. If you use air conditioning, it is generally no problem to brush latex paint every other day.