What certificate do you need to take after graduation from welding major? Please give me some advice.

International welding engineer, International Welding Association (Germany), awarded by Ha Hanpei, is jointly trained with many universities. In the first half and the second half of the year, on-campus training is more useful for European/joint ventures or companies with exports. However, many coastal companies have this requirement when looking for a job online, and the tuition seems to be around 5 K.

ASME American society of mechanical engineers seems to have training in Shanghai, but it is said to be very useful.

In fact, I think it's better to ask the tutor, who will give you the most direct information.