SELECT "Season Finale Date" FROM table_17997 WHERE "Winner" = 'Meiyang Chang'
When was the season finale of meiyang chang?
CREATE TABLE table_17997 (
    "Season" real,
    "Season Premiere Date" text,
    "Season Finale Date" text,
    "Winner" text,
    "1st Runner Up" text,
    "2nd Runner Up" text
)