Many thanks for your precious and most needed help on the below Qs:

Hi, we are 2 Romanians in need of your help.

We have a trip in December-January with forth and back, from Rome to Manila, and vice-versa.
Both ways have a stop in Guangzhou at Baiyun International Airport.
These are the actual flights (with China Souterhn Airlines):
Forth: 29 Dec 12:55 Rome > 30 Dec 09:40 Guangzhou > stop about 10-11 hours > 30 Dec 22:30 Manila
Return: Fri 13 Jan 17:30 Manila > Fri 13 Jan 20:30 Guangzhou > stop for just 1.5h, we will not exit the airport > 14 Jan 06:15 Rome

Few questions, please:
1. We want to go visit the city of Guangzhou for a few hours during our way to Manila. Will we enjoy the 72-h free transit?
2. Is your answer somewhat official? or should we check with some other authorities for the 100% answer?
3. From what you know, should we expect a possibility that this type of visa will change in the near future, such as a 6 months? especially with relation to Guangzhou.
4. What if we change our return flight and decide to have a bigger stop in Guangzhou so that we can visit it again for a very short stay (8-24h) can we take advantage of the 72h free transit, again?
I guess a general question would be: how many times in a given period can we take advantage of this?
5. If the plane has a technical stop in Wuhan, is that counted in for the visa conditions? we won't be able to exit the aircraft during the stop, as far as I know, I am not even sure there's the stop anyway.
6. Just to know for the future, if the plane has 2 stops in let's say Wuhan and Guangzhou but we only go outside the airport in Guangzhou, would that exit be eligible for the 72h free transit?

I know I asked a lot, so thank you so much!
Kindly,
Mihai