2ndhand smoke on streets

I totally understand the worry, especially being so newly pregnant and in an environment you didn't expect to be in. The good news is that occasional exposure to secondhand smoke on the street is very different from regular household exposure, and wearing a mask does help reduce what you're breathing in. That said, it might be good to check in with your gynae or PD when you're back just to chat through your concerns and put your mind at ease, since every pregnancy is different and they know your full picture. For now, try not to stress too much about it since stress itself isn't great for pregnancy either - just keep doing what you're already doing with the mask and staying indoors when you can, and you'll get through this trip.

my neighbour smokes a lot and sometimes I am sitting in living room I can smell the smoke.It is better when I close the door although I can smell the smoke still. I can understand that it's tough to avoid smokers esp in China.Just try your best to stay indoors and if smokers are near you just go faraway while wearing the mask