Given Guanyin’s popularity, one can find temples specifically dedicated to her not only in China but throughout the Chinese cultural sphere (Vietnam, Korea, Japan).
For example, in Ho Chi Minh City (formerly Saigon) in Vietnam, Guanyin is worshiped in the famous Quan Am (Guanyin) temple.
This temple combines Pure Land Buddhism with Daoism, the Jade Emperor, and other deities from Chinese folk religion.
The Guanyin of this temple has been popular with the overseas Chinese community, which had to cross the seas from China; since Guanyin is a patron of sea travel, she is all the more popular with these immigrants.