Looking for info on birth parents

I am looking for information on my birth parents. My brother and I were adopted from Seoul, South Korea in Oct 1978. We were at the orphange for 7-8 months. I am told it was a Christian orphange. My brother is supposed to be my blood brother. He was born Oct 10, 1074 and I was born Jul 29, 1977. Our birthdays are said to be accurrate. His name was Lee Byoung-Chul and mine was Lee Jee-Youn. I have not infomation about my birth parents except my birth father was an avid reader. Please send me a message if you have any possible leads.