Chang's environmental hotels are all christened "Gaia," the Greek name of the goddess of the earth and the source of all life. Chang's goal: "Man and nature in a sustainable relationship, living together in harmony."
張文毅的環保旅館都以「Gaia」（蓋亞）命名，希臘文原意為「大地之母」，亦即生命的源頭，或如張文毅所詮釋的「人與自然永續發展、和諧共存」。