Okay. I understand this is an extremely specific topic I am addressing. However, with the large expat population living in South Korea, this may be helpful to some.

I will begin by stating, this may not be the easiest approach for you. If you live in or near Seoul, this information will be a valuable resource. I used this VERY helpful website to use all this information when I applied. I now have a visa valid for the next ten years and have visited China three times in the past six months so I am satisfied.

-A valid passport
-Round-trip plane ticket confirmation to China
-Hotel confirmation in your name for a hotel somewhere in China
-A day by day itinerary of your trip
-₩190,000 (about $175) in cash…yikes
-a recently-taken color passport photo (bare-head, full face) against a white background (size: 48mm x 33mm). This can be done for ₩10,000 in a booth on site or in Seoul Station.
-The completed application form

Chinese Visa Application Service Center in Korea
6th Floor, Seoul Square building,416 Hangang-daero,Jung-gu,Seoul,the Republic of Korea[Post code: 100-714]
(Original Address: 6th Floor,Seoul Square building, No. 541, Namdaemunno 5-ga, Jung-gu,Seoul, the Republic of Korea)

-If you are in the station, head toward exit 8 and walk until you see the sign for Seoul Square Mall.
-Walk through the revolving door past the Dunkin Donuts and up the first escalator.
-Go up the next TWO more escalators you see until you find a set of elevators.
-If you are in the right place, you will start to see signs and the elevator will only go to one place: the 6th floor.

The visa only takes four business days and is only open 0900-1500 Monday-Friday. I applied on a Monday at 0900 and picked up at 0900 on the same Thursday. Good luck and happy traveling! xoxo