Shàngdì (上帝 pinyin "shàng dì", literally 'King Above') is used to refer to the Christian God in the Standard Chinese Union Version of the Bible. Shén 神 (lit. "God", "spirit", or "deity") was adopted by Protestant missionaries in China to refer to the Christian God. In this context it is usually rendered with a space, " 神", to demonstrate reverence. Zhŭ and Tiānzhǔ 主,天主 (lit. "Lord" or "Lord in Heaven") are equivalent to "Lord"; these names are used as formal titles of the Christian God in Mainland China's Christian churches.