Also went thru HF0 in SF. Had no problem coding 18 hours a day because I had lived in SF before and didn’t care about going outside :) That said most of my bat

Also went thru HF0 in SF. Had no problem coding 18 hours a day because I had lived in SF before and didn’t care about going outside :) That said most of my batch was not from SF and they had no problem staying in and focusing. So yeah I bet this works in Vietnam too.