The Mughals were especially known for their composite bows due to their Turko-Mongol roots. Waterproofing and proper storage of composite bows were essential due to India's extremely wet and humid subtropical climate and plentiful rainfall today (which averages in most of the country, and exceeds well over per year in the wettest areas due to monsoons). The civilizations of China also used a combination of self bows, composite recurve bows, and laminated reflex bows. Self bows and laminated bows were preferred in southern China in earlier periods of history due to the region's extremely wet, humid, and rainy subtropical climate. The average rainfall in southern China exceeds , averaging in many areas today. Origins and use Composite construction may have become common in the third or fourth millennium BCE, in Mesopotamia and Elam. Associated with charioteers Bows of any kind seldom survive in the archaeological record. Composite bows may have been invented first by the nomads of the Asiatic steppe, who may have based it on earlier Northern Asian laminated bows. However, archaeological investigation of the Asiatic steppe is still limited and patchy; literary records of any kind are late and scanty and seldom mention details of bows. There are arrowheads from the earliest chariot burials at Krivoye Lake, part of the Sintashta culture about 2100–1700 BCE, but the bow that shot them has not survived. Other sites of the Sintashta culture have produced finds of horn and bone, interpreted as furniture (grips, arrow rests, bow ends, string loops) of bows; there is no indication that the bending parts of these bows included anything other than wood. These finds are associated with short arrows, long, and the bows themselves may have been correspondingly short. The Andronovo Culture, descendant of the Sintashta culture, was the first to extend from the Ural Mountains to Tian Shan, and its successor cultures gave rise to the Indo-Aryan migration. It has been suggested that the Srubna culture (contemporaneous with, and a neighbour to, the Andronovo culture) used composite bows, but no archaeological evidence is known. Composite bows were soon adopted and adapted by civilizations who came into contact with nomads, such as the Chinese, Assyrians, and Egyptians. Several composite bows were found in the tomb of Tutankhamun, who died in 1324 BCE. Composite bows (and chariots) are known in China from at least the Shang Dynasty (1700–1100 BCE). There are strong indications that Greek Bronze