-lrb- hong kong lien ho pao11 mar 94 p 22 -rrb- shenzhen reaches agreement with south korean firm on oil refinery - china petrochemical corp -lrb- sinopec -rrb- has reached agreement in principle with yukong ltd , south korea 's leading refinery company , to build a $ 1.5-billion oil refining project in shenzhen special economic zone , guangdong province .