Leng is a large island in the Jade Sea, off the southern coast of Essos. To the north is the city of Jinqi in Yi Ti. East of Leng are the Shadow Lands, while to the south are the Manticore Isles. The island of Marahai is to the southwest.
Leng is an island of forests and jungles, with the cities of Leng Yi along the northern coast, Leng Ma along the central western coast, and Turrani along the southern shore. It is ruled by god-empresses who have grown rich from the island's spices and gemstones. The people of northern Leng are descended from Yi Ti, while the people of southern Leng, the Lengii, are a culture native to the island.
Leng was an isolated island for most of its history, as the Lengii did not welcome outsiders. Those who attempted to harvest the island's resources met a foul end, and it thus was avoided by mariners. Merchants from the Golden Empire of Yi Ti periodically managed to open Leng to trade. According to the Jade Compendium, however, the Old Ones who lived below the island's subterranean ruins instructed the Empress of Leng to kill the foreign merchants on at least four occasions. Leng was eventually conquered by Jar Har, the sixth sea-green emperor of Yi Ti. He sealed the entrances to the underground cities sealed under penalty of death, after which there were no longer massacres. The YiTish colonized most of the island, with the Lengii confined to the southern third.
Leng overthrew YiTish rule four hundred years ago and power returned to the god-empresses. Khiara the Great established a tradition whereby the empress takes two husbands, one each of Lengii and YiTish descent, with one commanding the island's armies and the other its fleet.
In 111 AC or 112 AC, Prince Daemon Targaryen gifted his niece Rhaenyra with a jade tiara said to have belonged to the Empress of Leng. Some of the great wealth acquired by Corlys Velaryon during his nine voyages was from Leng.