Originally Posted by
travelinmanS
Did you book the tickets? FM flights are treated exactly the same as MU flights for Skyteam earnings and lounge access. For Skyteam purposes they are the same airline. I am a DL elite plus and have never once been denied lounge access or denied points earning when flying on an eligible FM flight. I live in Shanghai and fly MU or FM 3 to 4 times a month. There is basically no difference between the two airlines.
As a DL elite I have never seen a difference either between MU and FM. But to some extent that could be rules between DL and MU that go beyond ST rules.
I would be a bit surprised to see if the PVG denied this one as it is operated by MU, but could be surprised. I could see that AF does not guarantee this.
BTW, I assume the OP is in economy and asking for access via ST+. If he is in business, then FM grants access w/o status.