A Gold-plated Copper Twitter Clock of the Qing Dynasty (1644-1911) is unveiled at the Shenyang Palace Museum, Nov. 16, 2020. The twitter clock was made in France in the 19th century. The bird on the clock can not only sing on time, but also freely open its mouths, shake its heads and wag its tails. Five table clocks dating back to Qing Dynasty have been restored and unveiled at the Shenyang Palace Museum. (Photo: China News Service/Yu Haiyang)

A Gold-plated Copper Twitter Clock of the Qing Dynasty (1644-1911) is unveiled at the Shenyang Palace Museum, Nov. 16, 2020. (Photo: China News Service/Yu Haiyang)

Five table clocks dating back to the Qing Dynasty (1644-1911) are restored and unveiled at Shenyang Palace Museum, Nov. 16, 2020. (Photo: China News Service/Yu Haiyang)

Five table clocks dating back to the Qing Dynasty (1644-1911) are restored and unveiled at Shenyang Palace Museum, Nov. 16, 2020. (Photo: China News Service/Yu Haiyang)