Hello,Before going to Laos to apply for non-b, wp3 have to do first, want to ask about WP3 how to do...
TLDR : Answer Summary
To complete WP3 for a Non-B visa application in Laos, your employer must visit the Ministry of Labor with all necessary documents. They will submit the WP3 application on your behalf and receive a confirmation that allows you to pick up your Work Permit when you show your Non-Immigrant B visa. Some provinces may allow this application while you are in Thailand, while others are more restrictive.