BEIJING - China is working on an ambitious ocean exploration programme that may send men 7,000 metres deep into the ocean.

Sun Zhihui, director of the State Oceanic Administration, Monday said that a deep-sea manned submersible vessel for the mission has been assembled last year and the test would begin this year.

If successful, the China-made submersible vessel would be the first manned vehicle to reach such a depth. So far, manned submersible vessels could only descend to 6,500 metres below the sea level.

According to Sun, the submersible vessel could carry a crew of up to three people, and would play an important role in deep-sea exploration of natural resources.