I asked about that too. It's from January 2017. GW just used the BITMAIN logo and mentioned Jihan is part of their team. Jihan's lawyers asked them to delete all the BITMAIN logos and not include him in their team. Done, all settled, no more legal problems.

Of course BITMAIN wouldn't want to be associated with GW, beacuse GW aims at decentralizing the mining power, while BIMTAIN is all for centralization with their ASICboost hacks and whatnot.