China's national legislators submitted more than 560 bills to the ongoing annual session of the National People's Congress (NPC), the top legislature, by the deadline for bill submission as of Wednesday noon.

The number of submitted bills increased 12.5 percent from that of last year's annual session, said He Yehui, an official in charge of receiving bills from deputies to the Fourth Session of the 11th NPC.

NPC deputies also put forward more than 2,960 pieces of suggestions and recommendations, he said.

Different from those in past sessions, about 80 percent of the bills submitted this year were based on deputies' field research, the official said.

Upon the completion of the socialist legal system with Chinese characteristics, bills on further revising and improving laws accounted for 60 percent of legislative bills, he said.