Ask the master for help. Part-time job in winter vacation, nine hours a day, my boss gave me 30 yuan. In Shiyan. Is this in line with the labor law or other laws?

You are a part-time job, which is not within the scope of adjustment of the labor law, so these provisions of the labor law are not applicable. Even if you work 12 hours a day and the salary is lower, you voluntarily accept such treatment, and the law will not interfere. Only regular workers can enjoy the benefits stipulated in the labor law, and other laws do not provide special protection for part-time workers.