After introducing ecological "red lines" in 2017, China completed drawing up ecological conservation lines nationwide last year, demarcating no less than 25 percent of its land area for protection.

With so many entities involved, how to demarcate roles and responsibilities?

"This vital investment marks the first project approved under AIIB's Accountability Framework, which clearly demarcate the roles and responsibilities of the Board of Directors and the president in respect of financing operations of the bank," Jin was quoted as saying in the statement.