China's Jiaolong submersible has successfully completed sea trials after undergoing its second round of upgrades. The submersible reached a depth of 7,056.9 meters during these trials in the Philippine Basin. These successful dives were enabled by the integration of new lithium batteries and thrusters. AI
RANK_REASON Research milestone for a submersible's deep-sea trial capabilities. [lever_c_demoted from research: ic=1 ai=0.0]
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