The most famous jade jewelry city in Beijing is Beijing International Jewelry Exchange Center (referred to as Xiaoying Jewelry City). If you have nothing to do, you can go shopping. It's ok there. It's available in all grades.
If you want to buy jade, you must buy Jade A, which is a natural jade without artificial treatment. Only jade A has room for maintaining and increasing value, and people raise jade and people. Jade will become more and more moist and bright when worn for a long time.