M visa application for sport competition

I am an Korean athlete and training in Toronto. I am invited to an competition in China.
I was not allowed to sumbit the m visa because I am staying in Toronto with ETA.
Is there a way to be allowed to apply my visa to China as an athlete that has to participate in an competition hosted by the China sport athority? Or I have to visit Korea and waste a couple of days without training. Please understand my situation and it would be highly appreciated when you find a way for me.

Thank you.