I will replace you to attend meetings with factories in Vietnam if necessary. In the production process, there will be many problems that arise, for example, price negotiation, product quality, production schedule, payment method, etc. You need a reliable person to represent do these things directly with the factory. There are things that need to work directly face to face to solve important issues in Vietnam.
I am your foot to work with all suppliers in Vietnam, you just need to talk to me and talk about the content you need to deliver to the supplier. I will negotiate directly with them to achieve your goals. All for the purpose of getting the most favorable terms for you.
You know you are a foreigner due to the language barrier, it is very difficult for you to negotiate directly with the factory in Vietnam. Things would be better if I would do this on your behalf.