Referenced In

The Travels of Marco Polo
by Marco Polo, da Pisa Rusticiano

"at a distance of eighty li, is Yiu-Ki city, where travellers disembark for the land journey to Yung-chun and Chinchew."

The Travels of Marco Polo
by Marco Polo, da Pisa Rusticiano

"Yiu-ki River, ii. 230n"