Glencore again extended the date by which it expects to close its merger with Xstrata, due to the ongoing investigation into the deal in China, according to Reuters. Glencore has been waiting for several months for China, the biggest buyer of the materials it trades and mines, to give the go-ahead before it can complete its $35-billion acquisition of miner Xstrata.

Glencore said it had held constructive discussions with China’s Ministry of Commerce, or MOFCOM, but that it had pushed the deadline date back to May 2 because it did not expect to have the final approval in time for its previous deadline of April 16.

The merger date has been pushed back several times, with Glencore saying in March that MOFCOM was focusing its attention on copper. MOFCOM is the only one of the world’s major watchdog agencies to take national industrial policy into consideration in its decisions.