Ruili River is located on the 24th parallel of north latitude, which is 5 latitude lines away from Hainan Island. However, due to the special geographic environment and climate relationship here, many tropical plants from Hainan Island also settle here. The pineapple honey tree is tall and stout, and it bears fruit in a different way from other fruit trees, bearing fruit on branches and trees, as well as on roots. A tree can produce up to several hundred fruits, and a large one weighs several dozen pounds. Because the skin and shape of the fruit is a bit like a cow's stomach, so the local people also call it cow's stomach fruit. (Dehong)