Is the social security welfare in Foshan much worse than that in Guangzhou? I come from Guangzhou. I found a suitable unit in Foshan, but my family often said that it was blessed there.

Whether the salary is low depends on what job you are looking for, and has nothing to do with social security benefits. You can ask whether the company will help you buy social security before you decide. Well, even if you want to change your job in the future and the company won't help you buy it, you can still go back to Guangzhou to continue buying it. Everything I bought before will have problems. You can consult the social security department of your local community neighborhood Committee first.