I still cannot find the name of this hibiscus specie. There are 2 garden centers both of them sell those kind of hibiscus (pink or white) and they are cultivated in Lebanon. They call it Lebanese Hibiscus that it's very popular in Lebanon.
I tried to look for pictures or information about this hibiscus but I didn't have luck!
if you can identify this hibiscus's name please let me know.. there is a picture of the leaves which are shorter than the chinese hibiscus and thinner.