It is mentioned in the problem description that you just turned 18 years old and work in a construction company. It is ok to apply for a credit card. However, because your current salary is very low, the success rate of applying for a credit card will be very low, and the refusal rate may exceed 90%.
Under normal circumstances, the four major state-owned banks are strict in examining credit card applicants. It is suggested that if you want to apply for a credit card, you'd better bring your ID card and proof of income to a commercial bank. China Merchants Bank, China Guangfa Bank, Industrial Bank and China CITIC Bank recommend that their card approval efficiency is high.
Tips: Under the current conditions, even if you apply for a credit card and barely pass the bank review, the credit card limit will not be very high. If you use a credit card, I suggest you plan your economy reasonably and repay it on time every month.