That depends on where Longgang is. Personally, I think some shops are not bad, but it depends on personal taste and preferences.

Recommend several restaurants in Longgang Central City:

Golden straw hats (near Longcheng Square on the first floor of Tesco): barbecue and buffet. I like their sushi.

Guangyuan rice rolls Wang (near Tesco on Longhe Road): Hong Kong-style tea restaurant, which is economical. Personally, I especially like Hong Kong-style restaurant.

Xiongben sushi (second floor of World Trade Center): Japanese food, and group buying is more affordable.

Tang Lou (4th floor, Pengdamore City): It should be Hong Kong Cantonese cuisine, with a per capita consumption of over 1, and only once.

I haven't been to many stores, but I feel these ones are good.