Hi, I am planning to go to Qinghai in September. Is the weather there friendly in this month, like Beijing? I will take the plane to Chengdu. How can I get to qinghai from chengdu? Is it possible to take bus or train? How long will it take? If I join tour in qinghai, how much time is enoungh to go to some most beautiful places in qinghai? Is 2-3 days enoungh? Can someone recommmend me travel agency that provides this service? thank you