1. 据史书记载，唐贞观十五年，唐室宗女文成公主远嫁，唐太宗派礼部尚书李道宗持节护送公主入藏，途经河源时，文成公主与事先驻礼在柏海迎候公主的松赞干布举行盛大婚礼，观赏河源风光。
Middle the tawu, lucky steps, the Gande area annual mean precipitation 474─540.9 millimeter, the year precipitation date number 118─162 day. Because the sea dials high, the atmospheric content only occupies inland about 60%, in one year does not have division the four seasons, only then difference changes in temperature, but separately is usually called the changes in temperature two seasons the winter and the summer.