1. identification: provide valid identification documents, such as ID cards and passports.
2. Education certificate: provide relevant education certificates, such as graduation certificate and degree certificate.
3. Technical training certificate: if you have participated in welding-related training courses or classes, you need to provide training certificates or learning certificates.
4. Work experience certificate: provide relevant work experience documents, such as work contract, labor contract and employment certificate.
5. Welding technology examination certificate: Generally, it is necessary to pass the welding technology examination and provide the corresponding examination certificate documents.
6. Health certificate: provide health certificate documents, such as physical examination report.
7. Safety training certificate: According to the requirements of relevant laws and regulations, it may be necessary to provide relevant safety training certificates.
Please note that the specific application requirements may vary according to regions and regulations, and it is recommended that you consult with relevant local departments or institutions to obtain the most accurate and up-to-date application requirements.