apply for a 72h transit visa after a humanity visa (1month)

I want to apply to enjoy the 72h transit, after a trip to HK :
but i have currently a work Z which will end in october and i will renew it 1month (humanity visa) and then i will go for a week-end in HK a then just come back in SH to pick up my luggage and leave for France. I already have my flight ticket from SH to Paris.