Si Muwu Ding is a ritual vessel made by Shang Dynasty or Zujia to worship his mother Wu. It is a representative work of Shang and Zhou bronzes in China, formerly known as "Simuwu Ding" or "Simuwu Dafang Ding". It was unearthed in Anyang, Henan, and is now in the National Museum of China. It is a national first-class cultural relic in China. Weighing 832.84 kilograms, it is the heaviest bronze unearthed in the world so far and is known as the "treasure of the town and the country".

When the tripod was first named, experts interpreted the inscription as "Simuwu". But with the discovery of more bronzes of the same period, experts now think it should be interpreted as' stepmother Wu'. However, due to the extensive publicity of history textbooks for primary and secondary schools (currently, the textbooks published by People's Education Press are still called "Simu Wuding"), the names of Simu Wuding and Simu Wuding are relatively famous at present.