Help, where is Xi 'an's "ghost market"?

As early as the Ming and Qing Dynasties, a well-known antique second-hand goods trading market was formed under the east gate wall of Xi 'an Xiaoxiao, which has a history of hundreds of years and is commonly known as "ghost market".

The "ghost market" is a market, but it is actually a street stall, and all kinds of goods are placed underground at will, so you can choose and buy them. There are a wide range of goods and samples here, from hardware screws to household appliances, and more clothes and bedding. In short, there are all kinds of daily necessities here. The ghost market is famous because the goods here are rich, and the key is cheap. Some goods are so cheap that you can't even think of them. Why is it cheap? There is something fishy about it. It is said that most of the goods here are from the wrong source, and many of them are stolen things, which should be stolen things. Thieves are eager to change money, so good things are even much cheaper than those on the market. Some greedy people and some people who come to Xi 'an temporarily often come here to buy daily necessities.