China's self-developed ultra-deep-water gas field, Deep Sea No.1, has seen the onshore manufacturing of its integrated processing platform completed and the platform's jacket put under the sea.

The integrated processing platform, made of an underwater jacket and a production module over the sea, is about 136 meters tall and weighs approximately 12,215 tonnes. The jacket platform is the world's most widely used offshore oil and gas production facility and serves as the base of the entire gigantic oil and gas production platform over the sea.