I guess apartment building in China all use Stucco. It is a very simple construction method, There is no 发霉 problem as long as it is built properly by skilled workers. That is why not every builder is able to do it, only certain builders. Richcraft, Mito, Aubundele(?), phoenix, Ashcroft..., only use bricks, partial stone, not stucco. Stone + Stucco looks more 高大上.
There are many houses were built with Stucco in RR , all are sold out with good price. at least 600,000 +, Do you know that? All those buyers and builders are "stupid", only you are very smart with good knowledge! (builder provided buyers opition to use stone or brick or stucco with same price). If this is a COMMON problem, why these builders still use stucco? they want lawsuit? they do not care their reputation?. These builders should know more than you know, because they are doing business, and you are only a 吃瓜 CFC.