In areas unknown to us ordinary people, there is an organization with mysterious power called the "9 Departments". They secretly protect the safety of the motherland and secretly fight against evil forces. They can risk their lives for an order, or they can go through mountains and seas of fire for an order. But these extraordinary people also long for ordinary love. Their love is like their mission, and like the stars in the sky. Only in the lonely night will they break through the sky desperately. Although it is not dazzling, it is still vast and hazy. The title of the book "Jiang He" comes from the first and last names of the two male protagonists - "Jiang Yan" and "Shen Xinghe".