Macaques on Hainan's Nanwan Monkey Island. [Photos by Wen Zhenxiao/Huang Yiming/Zhao Renbao/Liu Bingsheng/China Daily]

Nanwan Monkey Island is a place where trained macaques reportedly greet guests with salutes and flags.

Yet they lack discipline and often break formation or even squabble at the site in Lingshui county, in southeastern Hainan province.

Most simian denizens of the country's only macaque reserve are truly wild.

And, apparently, love to dive and swim.