How much time is required by bus from shenzhen airport to hongkong border by bus? What's the number?

It takes around 2 hours. Many buses are scheduled and there is no specific number.

Dear sir I think you misunderstood my question. I need to go to Luohu commerce city SZ from Bao'an Airport.
My question
1) which bus will take me from the airport to this centre?
2) how much amount would be charged?
3) how much time would be taken by the bus?
4) which part of the airport I would get this bus?
Thanks to reply above questions
Best Regards

You may take airport shuttle bus line 2 to the terminal, and then walk southwards for a few minutes to the commerce city.
I heard the bus departs from B terminal of the airport. The bus fare is CNY20 and it only takes about 1h to the last stop.