What is the background of the snow-cold forest map?

The picture of snow scene and cold forest in the painting spectrum of Xuanhe is a masterpiece of painters in the Song Dynasty. It was acquired in Anlu Village, Tianjin during the reign of Qing Kang Gan. Anlu village is famous, and his father An Shangyi is a salt merchant, and his family is rich. During the Yongzheng period, the father and son donated their property to repair the old city of Tianjin. Although Anlu Village is rich, it is indifferent. For the sake of salt affairs, he traveled between Huainan and Jingu, and when he met what the painter sold, he bought it with a large sum of money. He hid them for a while and then put them into the sea. "Snow Scene and Cold Forest" is one of his collections. Anlu Village wrote "The View of the Stars" and recorded its collection, especially referring to the precious value of "Snow Scene and Cold Forest Map", calling this painting "the selfless product of Song painting".

After the death of Anlu Village, his descendants sold the snow scene and the cold forest map to the governor of Zhili, and the governor of Zhili also dedicated this painting to Emperor Qianlong and hid it in Yuanmingyuan. 1860, British and French troops invaded Beijing and Yuanmingyuan was robbed. This painting was taken to the bookstore by foreign soldiers and sold to Zhang Yi. Zhang Yi and Zhang Shucheng are two great collectors in modern times. Zhang Yi, a native of North Tongzhou, settled in Tianjin in her later years. He loved antique calligraphy and painting all his life and spared no expense in asking for help. His son, Zhang Shucheng, also likes antique calligraphy and painting, and is better at distinguishing authenticity. The Zhang family has been looking for savings for two generations, and there are many paintings and calligraphy of cultural relics in the family, which are the most exquisite. The map of snow scene and cold forest was discovered by Zhang Yi in Beijing. After he bought it from foreign soldiers with a large sum of money, he immediately brought it back to Tianjin for secret collection and became a treasure handed down from generation to generation. It is said that even his closest relatives and friends have not met.