Hi,
I am a Singapore passport holder and i am going to Guangzhou for 11 days before leaving to Hongkong for another 3 days. After my Honkong trip, i am going back to Guangzhou for 4 days. Like so, is there a need for me to apply for a china vsia? The total number of days would be 18 days, including the 3 days in Hongkong. Please advise.

Thank you.