You can take a taxi to the railway market. They are all roasted mutton, such as Ma Yi Hei,

You can also go to the gate of Bo 'ai Garden, and there are several roasted mutton shops, but I don't know exactly when they close.

There is also a pit on Bayi Road, or Kunlun Square, but it is seldom cold and it closes early.

there are fewer mala Tang, and they usually close early. There are only a few on the other side of the market, just opposite the sunny style. It's almost the same to go at 6 or 7 in the evening. Golmud's general night markets are all in these places, and other places like many residential areas have some snacks in dribs and drabs, which are usually barbecues.

I hope it works for you.