Visa for Japanese citizen/passport holder now staying in Geneva

I will need to be in China for 2 months (October & November 2018) for a fully funded artist-in-residency near Shanghai.

I have already downloaded the V2013 form online from the Chinese Embassy website (& have filled the form); & I understand that postal, or email, or fax are not acceptable means for visa application.

My question is:
Is it possible for me to find a travel agency in Geneva to help filing and submitting my application on behalf of me? I have to stay around in Geneva for most of the time, it's really not quite easy to find time to visit either Bern or Zurich in person. Thanks!!