China will introduce a series of regulations and documents in accordance with the foreign investment law to protect the legitimate rights and interests of foreign investors, Premier Li Keqiang said on Friday.

This is an important thing China is to do in the next step to ensure that the law is implemented smoothly, Li said at a press conference after the conclusion of the annual session of China's national legislature.

Li underscored efforts to make the complaint mechanism open, transparent and effective.

China's national legislature on Friday passed the foreign investment law at the closing meeting of its annual session. The law will become effective on Jan. 1, 2020.

The law will offer better legal support to the protection and attraction of foreign investment, as well as regulate government behaviors, Li said.