hi, there please kindly need your advice.
Im travelling to shenzhen for shopping trip and will stay there for 5 nite. During my stay I am planning to have 1 day trip to hongkong through louhu border and back to sz at nite.
I will prepare chinesse visa in my country, Is it true that regarding my 1day trip to hk and back to shenzhen at nite require me to obtain a double entry chinesse visa?

please advice my following itinerary :
day 1 shenzen
day 2 b train to guangzhou for day trip shopping and get back to sz at nite
day 3 shenzhen
day 4 to macau round trip by fery
day 5 to hk round trip by train/MRT.

Is it too ambitious to do these schedulle?fyi, im not going to sightseeing, only for shopping--except for macau--

thank you very much for repply.