China tourist visa for Employment Pass holder who is working in Singapore

Hi Linda,
I'm a Employment Pass holder who is working in Singapore and I intend to go to China for a holidays
there most likely in mid June. My question is whtr I need to apply China visa in Singapore to enter China for my holidays and what are the requirements form, docs that I need to submit together for the application of China visa. I need just a single entry pls explain SPR,WP,EP,STP,DP?
Thank you once again for your kind adv and assistance.