Consequently , the county branch of Gwangmyeong and Soha town merged and formed a new city of Gwangmyeong , instead of being annexed to Guro - gu , Seoul .
In 1981 , the annexation to Seoul foundered as Seoul 's unexpected rapid growth greatly concerned government officials .
The county branch of Gwangmyeong and Soha town merged and formed a new city of Gwangmyeong , instead of being annexed to Guro - gu , Seoul .
In 1981 , the annexation to Seoul foundered as Seoul 's unexpected rapid growth greatly concerned government officials .