Irish Citizen working in Korea looking to get Chinese Visa

I am planning a trip to mainland China including Tibet in March of this year. I am currently working and living in South Korea. Apparently I cant get a Chinese type unless I have at least 6 months left on my Korean Alien Registration Card, which I don't have and the card doesn't expire until March 31st. Can I obtain one through the Chinese embassy in Dublin if I post my passport there before this date? Thanks in advance, any advice would be great.