Alibaba Group Chairman Jack Ma said Thursday the company will start talking to private equity firms about the possibility of buying U.S. search giant Yahoo Inc. “So many PEs (private equity firms) are talking to us and we will start to talk to them in the next few weeks,” Ma said at Asia D, a conference hosted by All Things Digital, an online publishing partner of The Wall Street Journal. He also said that Alibaba is interested in partnering up with U.S. companies though he didn’t elaborate.