The real treat in Ruili is heading to the covered food area in Huafeng market, which has seating for several hundred diners and comes alive from about 8pm onwards, especially at weekends. Jojo’s Barbecue is highly recommended, particularly the fish encrusted with tandooriesque, bright orange spices (look for the sign in English, though not much English is spoken, and not much Chinese either). The food is all laid out on show so ordering by pointing is simple, and you can wash it down with Myanmar Beer or any number of the fresh juices.
There’s also Thai food around town. Best is the Krou Thai Restaurant (可傣饭店, kě dăi fàndiàn) on Biancheng Lu, though the basic Myanmar Garden, up at the jade market, has outdoor seating and good Thai and Burmese snacks too. Plenty of places also sell freshly squeezed fruit juices, very refreshing on a hot day. For conventional Chinese food, head to the string of restaurants on Ruijiang Lu beside the long-distance bus station.