The detail conference venue information will be available about on Dec 1, 2021.
The modern development appears to have helped the city compared with the architecture from the 1950's which was there before and at the same time it has retained a lot of its historic character
The city retains its fortified walls, and has many old districts especially around the Xian Museum with its superb collection of Buddhist sculpture and Stone tablets with ancient writing on them. Personally I found this of more interest than the Terracotta Warrior site, though that's also worth seeing.
There are many historic sites in the area and so if you are coming to China for a short Tai Chi training period, this is a good area to base yourself to see a bit of culture as well as do your training.