If I apply visa to China for tourism purposes, can I get the visa on the same day?

It has nothing to do with which type you apply for. It depends on what service you choose. The quickest way is to choose rush service and you will get it next day, which means it takes two days to acquire the visa.

Because now i am from china ,So if you want to apply in hk ,then after one working day to get the short time such as 1 or 2 months china visa ,one working days ,means need for 2 days.today morning apply for it ,then next day of afternoon you will get it .
But if for long time such as one year type,can not be so short for the process time .