Chinese Buffet is quite easy to find. From  Tortosa, go to the 2nd roundabout in Amposta, (has a big stone monument,  like a bird?), turn left, after a couple of smaller roundabouts, you will see an electric appliance shop on the right hand corner, still carry straight on, and the Chinese is there on your left. Think it's called the Asian Wok?
There is another Chinese restaurant almost opposite, but best is on the left hand side. It opens early, but best time for lunch is after 1pm. when everything is ready, and  it's cheaper, Mon-Frid, dearer at weekends and fiestas. Evenings don't expect much before 8pm, and again a bit more expensive.
If anyone doesn't like Chinese food there's plenty of other choices, too many to mention.  Desserts are scrummy too.