The only authorized Christian publisher in China is celebrating a milestone on Saturday as the 50 millionth Bible rolls off the presses, according to a report in the Times of London.

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Demand for the Bible is soaring in officially-atheist China, at a time when meteoric economic growth is testing the country’s allegiance to Communist doctrine, the Times of London reports. Now, the demand in China for Bibles is such that Amity Printing, a joint venture between Chinese Christian charity and the United Bible Societies, a Protestant organization, can barely keep pace.

Early next year it will move into a new, much larger factory on the edge of the eastern city of Nanjing to become the world’s single-biggest producer of Bibles.

“This platform has been built as a blessing to the nation. It will print Bibles for China for as long as it takes to do it,” said New Zealander Peter Dean, of the United Bible Societies.

In careful adherence to China’s laws that prohibit evangelizing, the Bible is not on sale in mainstream Chinese bookshops but through a distribution system managed by the official church, such as stalls set up for people attending morning service, according to the Times of London report.