Generally speaking, the quick questions of urban planning do not need architectural symbols to express their functional land, but can be distinguished by colors, marked by legends or marked by Chinese characters.

Standard building symbols are generally used in some formal drawings such as engineering drawings and survey drawings. You can find the national architectural standard design atlas. But there is no need to buy it. Not cheap. Use the electronic version. Just download it from the internet. I suggest you go to Tianyuan local forum. Many people are willing to help you solve your doubts, and the information is very complete.