What is "tuancheng"

Tuancheng, literally "Circular Wall", "Round Fort", or "Round City", may refer to:

• Tuancheng Fortress ( Chinese: t , s , p Tuánchéng Yǎnwǔtīng) in Beijing, China
• Tuancheng Island ( t , s , p Tuánchéngdǎo) in Kunming Lake at the Summer Palace in Beijing, China
• Round City ( t , s , p Tuánchéng), a former island in Beihai Park in Beijing, China
• Tuancheng Township ( t , s , p Tuánchéngxiāng) in Lushan County near Pindingshan, Henan, in China