Team China won 56 gold medals.(否定句) Team China —— —— 56 gold medals .

问题描述:

Team China won 56 gold medals.(否定句) Team China —— —— 56 gold medals .

因为是过去式。所以改成否定句应该是:
Team China didn't win 56 gold medals.

Team China didn't win 56 gold medals.