CREATE TABLE table_40628 ("Japanese name" CLOB, "Kana" CLOB, "Hanja / Kanji" CLOB, "Korean name" CLOB, "Hangul" CLOB)

What is the Hanja/Kanji of the Province with a Korean name of Chungcheong-Bukdo?
SELECT "Hanja / Kanji" FROM table_40628 WHERE "Korean name" = 'chungcheong-bukdo'
SELECT "Hanja / Kanji" FROM "table_40628" WHERE "Korean name" = 'chungcheong-bukdo'