The things that China Agree to do once the Treaty of Nanjing was signed are:
-create a "fair and reasonable" tariff
-allow Britain to trade at five ports
-surrender the territory of Hong Kon
Explanation:
Treaty of Nanjing, (August 29, 1842) treaty that closed the first Opium War, the first of the complex treaties among China and outer imperialist powers. China paid the British a compensation, ceded the territory of Hong Kong, and granted to build a “fair and equitable” tariff.