About 6 months multiple entry visa from New Delhi with 30 day limit.

Hi there,

I am an Indian passport holder and I have got 6 moths multiple entry visa from New Delhi with 30 day limit. I will be staying in Shenzhen for next 5-6 months for my business. Is it possible for me to stay in Shenzhen for say 29 days and then go to Hong Kong and come back on same day? will there be any problem with that??

Thanks.