In June of 20 12, Middle East Institute made an oral agreement with Chen: "Four shifts and three shifts operate, with a probation period of three days and a salary of one month during the probation period 1290 yuan. (Salary 930 plus card subsidy, living expenses in 200 yuan 160 yuan) After the probation period, sign the contract, pay social security, find someone to cover for the shift, take an emergency leave, and deduct 30 yuan's salary every day. Actually, there were three shifts, three shifts, no overtime pay and no social insurance. 10, Chen had to work in shifts (24 hours) because of something at home, so he asked his colleagues to cover for him and entrusted him to collect his salary as a substitute fee. The accountant said he would collect it himself. On the 29th of this month, Chen returned to his unit to receive his salary, but was told that he was dismissed on the grounds that he would not make a fake or pay his salary. The patrol leader of the employer Zhang Guiyun insulted and threatened him. Chen: Violating the probation period, not signing the contract, not paying insurance, not getting paid at work, being dismissed, being bullied and insulted. Excuse me: Is it legal?