Thanks for all the responses! Since I trust you all more than the article, I will convince myself that the smell of sewerage is normal for stinky tofu or rotten tofu (how do you actually know the difference between the two, when you buy it?)
Well, the first week I constantly had to go to the toilet with a lot of cramps. The second week I didn't had to go constantly but it was definitely not normal, also I began to get very nauseous all the time! I also got sick with a little fever, and very tired. But normally this would be caused by a viral infection on my sinuses (air pollution, air condition are the triggers, together with a lower immune system). The stomach problems are of course caused by the food, and is not helping to boost my immune system :p
It's a real adaptation when you go to Kunming (probably whole China), which I haven't expected!
Thank you all for the responses! I will check it out!
The PhD student of the local university didn't found real plans, so it could be that the government isn't very much concerned about the environmental problems or it isn't made public. But it's good to know that there is a NGO for it!
If this is true, then I finally know why I have food poisonings all the time! A lot of the tofu stinks here (some more than others and I already had one that smelled like sewerage!), but I thought that it's just because they are almost at their end date, so when the smell was bearable, I would still use it in dishes..
Ok thanks!! I will trust the local university for finding the correct information! I knew China did not give information easily, but I hoped that they would be more generous about the care of the environment. But we will see :)