I plan to travel to South Korea this Dec. But the Korean officer told me it's difficult to get a visa using my RTD but it's easy to apply visa using my Chinese passport which is still valid. I asked my lawyer and she said it's ok to use my Chinese passport to apply visa and enter South korea and I should have no problem back to US. She even told me I have no problem update my Chinese passport in Chinese Consulates. Can anyone provide some ideas? Thank you very much!!!