Hainan Sunbeam Snake

Xenopeltis hainanensis, the Hainan sunbeam snake, is a non-venomous sunbeam snake found in China, from Guangxi east to Zhejiang and south to Hainan, and in Vietnam. No subspecies are recognised. Its highly iridescent, polished scales are its defining feature, and dark pigment beneath each dorsal scale enhances the iridescence. (The Reptile Database; Wikipedia, general species account)

It grows to an average of about 0.5–1 m and has greyish-white belly scales. It is oviparous, with females laying up to 10 eggs. Together with Xenopeltis unicolor it forms the family Xenopeltidae, and it is a constrictor that eats frogs, other reptiles including snakes, and small mammals. (Wikipedia, general species account)