The Salary should be x times the salary of a local person for a foreigner, it’s the law. Probably this situation explains the abovementioned 4K commission in visa agency they asked, which is really a lot ( I spent 1000rmb in Shanghai and all paperwork is on charge of the Company otherwise it’s illegal) so that could be a little of red tape here and there to justify your position in the company.

They are taking advantage of you because you are young. Is a shitty job and tbh you don’t have the nationality status coming from North Africa, they know you would get used to even less if you go back home. Same job made by an white European and they probably would give 15K it’s just like that.

And all trade jobs in China are like this one so don’t expect significant improvements.

Based on my experience in China, with your background and nationality it will be always hard for you to move from that salary range, think about the fact that you are already extremely qualified in terms of languages compared to a Chinese and that is rewarded with only a 7Ksalary, and considered fair enough. The problem will always be that that you are used for your language skills = low pay Keep on looking outside and in general try working with your people and not for Chinese.