Introduction to Yongjilong: Yongjilong was built in 1930. It is one of the early reinforced concrete buildings in Beihai. The owner is Chen Botang, a native of Fangcheng. When his cousin Chen Jitang (King of Nantian) was in charge of Guangdong (1930-1936), he often stayed here when he returned home. On the eve of liberation, he served as the "Guangdong-Guangxi Border Region Bandit Suppression Headquarters" of the Kuomintang.