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The hydrothermal sulfide is a kind of seabed deposit containing copper, zinc and precious metals such as gold and silver. Those metals formed sulfides after chemical reactions and came to rest in the seabed in "chimney vents."
He added that the two leaders should maintain regular and close communications and exchange candid and in-depth views on fundamental issues.
Calling each other "the most important cooperation partner in their respective regions," China and Germany agreed to maintain frequent exchanges of high-level visits and close communication through bilateral and multilateral channels.
BEIJING, Nov. 25 (Xinhua) -- China will step up work on major water conservation projects, especially in rural areas and central and western regions.
In their congratulatory messages to Xi, leaders of the six countries lauded the enormous achievements China has scored in its economic and social development drive.
来源：资阳报