(LEAD) Seoul education chief summoned again over bribery charges
(ATTN: UPDATES with superintendent appearance throughout)
(ATTN: UPDATES with superintendent appearance throughout)
(ATTN: UPDATES with attribution, fresh quote in first five paras; TRIMS)
HONG KONG, Sept. 6 (Yonhap) -- Hyundai Motor Co.
HONG KONG, Sept.
SEOUL, Sept.
SEOUL, Sept.