https://en.wikipedia.org/wiki/Jingdezhen_porcelain

I think SophieMarie is right !!
I can not read the Chinese language !! While one of the characters is slightly different it may not make a difference since the mark indicates the area where made !! Wish we could see the pattern better on your vase but scroll down on the link and look at the stem cup !! Click on that pic and it will enlarge it !! Similar pattern as yours !!
Looks like a very nice double gourd vase !!