Thank you, it took me forever to have gas again but now it s done.
I didnt need to refill the gas but I did. I t was a battery problem.

For someone who need some information about the gas... if you dont have any gas, first check if the gas panel box have enough battery, if not you will see a black rectangle under the figures of the counter, and so just change the battery (disposed above the counter screen) (for me it was 4 battery R6 normal size battery (for gameboy )

How to make a new gas card... you need to know your gas company name(written in chinese in the gas box).

So my collegue called the chinese gas company of my flat (Pingod) and told me to go directly to the gas company to remake a card with :
- my original passport
- a copy of my landlord ID
- a copy of the tenancy agreement
- 22,5 RMB for the card

the gas company is located at the residence named Guang Ming Lou Jia #22 (光明楼甲22号) around Jinsong (exit north west):
- Go west, pass the Guang Ming Bridge and one (not sure)light stop, you will be on the Guang Ming Lu (Road but not the residence)
- between the Guang Ming Lu (road) #10 and #20, you will find a very complicate and illogical residence named Guang Ming Lou, the number 22 is inside the small perpendicular road(be careful nb are note chronologic).
At the right of the #22 you will find the number "甲jia 22" (look like a garage).
- Get in and it's done!

So funny story, I put my new gas card (that I refilled only in a Bank of Beijing)in the gas box and still no gas...
So my collegue called a guy who fixe gas machine, he came at my kitchen and said... Oh you don't have any battery... I changed and I had gas!!!

So before doing a big trip, check the battery!!

Advice after experience!!

Is that a commercial advertisement?!!!