Yunzhou City on the banks of the Lancang River hides the secrets of the 600-year-old Tea Horse Road. Shi Qingya, the sixth generation descendant of the Shiji Tea Company, followed the instructions of his ancestors that "tea must go north" and rejected the stable southern trade route. He resolutely took spring tea from the ancient trees of Baiying Mountain and embarked on the dangerous ancient northern route. From Yunzhou to Xiaguan, and then to the snowy Lhasa, he broke into the Taipingshao bandits' den, crossed the Shenzhou to cross the natural dangers, fought against the overlord of the Xiaguan tea market, and formed a caravan alliance to protect the road. Along the way, he got to know and stay with Ayi Nuo, the owner of the Yi family horse shop. He shared life and death with the old pottou Chen Dachuan, guarding the tea road passed down by his ancestors with blood and faith. With six hundred years of deep hoof marks and six hundred years of scent of tea, this road not only carries the rise and fall of Yunnan-Tibet trade, but also bears the perseverance, loyalty and inheritance in the bones of the Chinese people.