What key details about chung eui-sun  can be extracted from the following bio?  Bio: chung eui-sun -lrb- born october 18 , 1970 -rrb- , also spelled chung eui-son , is a south korean businessman . he is the vice chairman of hyundai motor company and the only son and `` heir apparent '' of hyundai motor group chairman chung mong-koo .
The answer to this question is:
- relatives is 3 sisters- children is 2- birth date is 18 october 1970- name is chung eui-sun- nationality is korean- parents is chung mong-koo , lee jung-hwa -lrb- deceased -rrb-- birth place is republic of korea