The 19 year-old South Korea international is a target for OM sports chief Andoni Zubizarreta.
A source close to Kang-in told Le Phoceen: "For the moment, Kang-in is waiting to resume training with Valencia next week. For our part, we are in contact with several clubs, including some in France, but the situation has not yet advanced.
"We speak with everyone, including Germany and England, but the French championship would indeed be a very good thing for Kang-in. Everyone knows him in Ligue 1, because he was MVP of the last U20 World Cup. I cannot tell you if there are discussions with Marseille, but it is a very large club and it would be great for the player.
"What I can tell you is that Valencia would certainly be interested in a loan. Afterwards, you have to know if Marseille is also interested in this possibility."