Over the past three years, three canoes have been excavated successively on the beach of the Huaihe River in Xi County, Xinyang County, Henan Province  Among them, the first canoe was found under the beach of the Huaihe River of Zhangzhuang formation in Xuzhuang Village, suburban Township, Xixian County in 2010, which has been proved to be one of the earliest and largest canoes found in archaeology in China  The canoe is 9 3 meters long, 0 8 meters wide and 0 6 meters high  According to carbon-14 measurements, these canoes are made of the same materials as the wood produced in tropical Yunnan  This shows that in ancient times more than 3000 years ago, the climate of Henan was very similar to that of the tropics today
The two ends of the canoe are pointed, chiseled from a complete log and well preserved.
 The climate on both sides of the middle and lower reaches of the Huaihe River is warm and humid, with tall and dense trees and a wide variety of animals and plants