Which of the following statements are true?
A.
Kaiping diaolou were built for defence against bandits and for refuge from the floods.
B.
The best preserved diaolou structure in Zili Village is the Ruishilou. It is a 9-storeyed reinforced concrete structure and the lost luxury.
C.
The Yinglonglou in Chikan Town is the oldest diaolou structure and is free from foreign influences.
D.
Fangshi Denglou is a reinforced concrete structure built by the Fang family and is a typical diaolou structure as a watchtower.