Corona Virus Update!
Since the Lowu/Luohu und Huanggang land borders are closed, all ferry services are stopped and only the Shenzhen Bay border is open.
(Shenzhen Bay border has no 5-Day-Shenzhen-Visa office) there is currently no way to get the 5-Day-Shenzhen-Visa. And even if, from Saturday Feb 7th onward Hong Kong imposes a mandatory 14 days quarantine for anybody that arrives from China. People that had been to Hubei province in the last 14 days will be banned from entering.
This link has the latest virus related travel restrictions:
Cathay Pacific Travel Advise (Not working anymore)