I cannot hear the mosquitos in Beijing making high picth noises anymore. I asked a few people and they agreed with me. One possibilty is I and those people are too old to hear (all above 46 years old). Do you know if mosquitos still make noises? Thanks.
I can hardly see any mosquitos in Beijing, even in the hutong areas. I guess what you encounter now are not the same species of mosquitoes as you saw before: the new species does not cry or scream out loud. They might sing, though.