Kat O is an island west of Mirs Bay and east of Sha Tau Kok. The English name, Crooked Island, is inspired by its shape, which resembles an inverted Z. Kat O’s sinuous coastline makes it a natural shelter. It has always been a lucky anchorage for fishermen; thus, the Chinese name Kat O, which means auspicious bay.

Kat O once had a thriving population of more than 6,000 sea and land dwellers in the 1950s-1960s. Most of the villagers were fishermen or farmers; some ran a business on the island. Kat O islanders began migrating to Europe, Australia and other countries in the 1950s. During major festivals, like the decennial On Lung Ching Chiu or Tin Hau Festival, which falls on the 23rd day of the third month of the lunar calendar, many ex-islanders who now reside overseas return home. As the crowds gather for big parades, lion dances, the Fa Pao challenge and traditional folk performances, the quiet island becomes lively and bustling once again.