An airman takes part in a live North China Sea Fleet air combat drill at a naval air force training base on Oct. 19, 2013. The system was put into use in August 2013. The training laboratory uses 3D information technology to simulate a battle. It is multi-functional - the airmen can experience flying one or many planes, has panoramic views by wearing a helmet, and there is a large-screen projection and live air sound effects. [Photo/pic.chinamil.com.cn]

An airman takes part in a live North China Sea Fleet air combat drill at a naval air force training base on Oct. 19, 2013. The system was put into use in August 2013. The training laboratory uses 3D information technology to simulate a battle. It is multi-functional - the airmen can experience flying one or many planes, has panoramic views by wearing a helmet, and there is a large-screen projection and live air sound effects. [Photo/pic.chinamil.com.cn]

Airmen take part in a live North China Sea Fleet air combat drill at a naval air force training base on Oct. 19, 2013. The system was put into use in August 2013. The training laboratory uses 3D information technology to simulate a battle. It is multi-functional - the airmen can experience flying one or many planes, has panoramic views by wearing a helmet, and there is a large-screen projection and live air sound effects. [Photo/pic.chinamil.com.cn]

Airmen take part in a live North China Sea Fleet air combat drill at a naval air force training base on Oct. 19, 2013. The system was put into use in August 2013. The training laboratory uses 3D information technology to simulate a battle. It is multi-functional - the airmen can experience flying one or many planes, has panoramic views by wearing a helmet, and there is a large-screen projection and live air sound effects. [Photo/pic.chinamil.com.cn]

An airman takes part in a live North China Sea Fleet air combat drill at a naval air force training base on Oct. 19, 2013. The system was put into use in August 2013. The training laboratory uses 3D information technology to simulate a battle. It is multi-functional - the airmen can experience flying one or many planes, has panoramic views by wearing a helmet, and there is a large-screen projection and live air sound effects. [Photo/pic.chinamil.com.cn]

An airman takes part in a live North China Sea Fleet air combat drill at a naval air force training base on Oct. 19, 2013. The system was put into use in August 2013. The training laboratory uses 3D information technology to simulate a battle. It is multi-functional - the airmen can experience flying one or many planes, has panoramic views by wearing a helmet, and there is a large-screen projection and live air sound effects. [Photo/pic.chinamil.com.cn]

An airman takes part in a live North China Sea Fleet air combat drill at a naval air force training base on Oct. 19, 2013. The system was put into use in August 2013. The training laboratory uses 3D information technology to simulate a battle. It is multi-functional - the airmen can experience flying one or many planes, has panoramic views by wearing a helmet, and there is a large-screen projection and live air sound effects. [Photo/pic.chinamil.com.cn]