回复：I am H1 holder. it is ok for me to volunteer my service

来源: 于 2008-12-02 20:38:13 [旧帖] [给我悄悄话] 本文已被阅读：次

You will be fine as long as you have no honorarium, wage, salary or material gain derived from these activities. Reimbursement for transportation and reasonable living expenses is permissible.