I am not going to argue against the smoking issue, but only the comparison of life expenctancy. China is a continental sized country with bigger population and diverse living conditions comparable to the whole Europe and US. Comparing China with countries like SK and Japan is like counting only 10% of Chinese population (the size of Japan) from the big cities. To put it in a bluntant way, countries are never equal in many ways, contexts and perspectives.
According to
, in 2023 US is 79.3, Europe is 79.1, China is 78 which is close. If we consider China only reached this level of wealth and health care in the past 2 decades while US and Europe have been in where they are since WWII, China can be seen better.