The mosque covers an area of 6000 square meters and is divided into four courtyards. There is a wooden arch in the first courtyard. The prayer hall, which is in the fourth courtyard, can accommodate more than a thousand people. The architecture is a mixed between traditional Muslim and Chinese styles.
The Great Mosque is located in the Muslim Square area, which means you can get a lot done in this area. One of the most important of which is shopping for souvenirs. When you visit other sites of interest, you'll find people selling souvenirs, but my recommendation is to go to the Muslim Square to do your shopping. There are many shops in this area and more choices. Most importantly, you can bargain.
There's a cosy little cafe near the mosque where you enjoy some tea or coffee after you've done your shopping.