Entry in HK, I am an Indian national and have already been granted China visa for a month.

Hello,
Due to change of plans I now have to travel first to Hong Kong and then directly to Beijing. I have following questions:
1) Would I be expected to get one on arrival in HK?
2) Will there be a problem if I enter mainland China from HK rather than from India?

I would appreciate if your could reply asap.
Thanks