Backed up by Meituan, one of the most popular food delivery apps, Meituan Maicai is an online supermarket with an emphasis on fresh meat, fruit, vegetables, etc. The market has warehouses dotted around town, with mostly domestic products at affordable prices. They offer same-day delivery in different time slots. In addition, they also have a pretty good selection of beers, local snacks, and kitchen necessities like condiments. To access the product list, check Meituan, and click / research 美团买菜.