Gan Long said that China is everywhere, no matter which book foreign goods come from.

In the fifty-eighth year of Qianlong (1793), on August 13th, Emperor Qianlong met with the British envoy Magalny in the summer resort, and arrogantly declared that "China is rich in natural products and has everything, so there is no need to borrow foreign products to exchange needed goods". Therefore, this sentence should come from Magalny's "1793 Introduction of Ganlong Ambassador to Britain".