This file photo, taken in 2011, shows the Chinese submersible 'Jiaolong.' The submersible broke through the 7,000-metre mark in an ocean dive on Sunday, state media said, setting a new national record... more 

This file photo, taken in 2011, shows the Chinese submersible 'Jiaolong.' The submersible broke through the 7,000-metre mark in an ocean dive on Sunday, state media said, setting a new national record for China less