Jiaozhou Bay
Xiao Qingdao was a restricted military area until 1987. During the German occupation in 1900, they named "Qingdao" for their leased territory, and built a lighthouse on Xiao Qingdao island. After 1914, the Japanese attacked Jiaozhou Bay and occupied it, and afterwards they renamed Xiao Qingdao to "Kato Island".