Qinghai Province is named after the famous Qinghai Lake. It is a land locked province in northwest of China. It covers an area of 720,000 km2, making it the fourth largest administrative body in China. It is a major part of what in geology is called Qinghai-Tibet Plateau; it is often referred to as Roof of the World as it boasts an average altitude of over 3000 meters. It is home to some 6 million people, primarily consist of Han ethnic. They share this land with ethnic minorities such as Tibetan, Hui, Tu and Sala. Much of Qinghai sits in a zone known as Plateau-Continental Climate Zone. It is translated as dry and cold climate with many days of sunshine all year round. Some suggest that the best time to visit Qinghai Province is during the period of May to October. In the middle of May every year, the grass becomes green and plenty of migratory birds get together in Qinghai. Its rugged mountains are perfect home to many river systems, two of these river systems are named respectively as Yellow River and Yangtze River. They are probably the most important river systems in China. Most of Chinese ancient civilization and industries are concentrated along the banks of these two mighty rivers. All of that found it source in mountains in Qinghai.