New F Visa in Hong Kong

Hello,

I was doing non-paid internship and learning Chinese for 2 months in Shanghai, now I have another freelance project for 3 to maybe 4 months in Shanghai for getting more experience. My current F will expire on 28th of September and I would really like to apply for a new F without going to my home country. I've heard that there was an option going to HK, but it seems like impossible to apply now.

Could you please advise what is the best way to get my new F? Thank you.