UK national travelling to HK and then to Zhuhai by ferry. Can I apply for a visa at Gongbei?

Hi. It is too late for me to apply in the UK. What are the restrictions of the issue there?

I would also like to briefly visit the city of Dongguan - am I able to do this from Gongbei? If I also wanted to visit Ningbo - am I able to do this issued from Gongbei?