In the first of a two-part series, Christopher Landau examines an extraordinary phenomenon - the rise and rise of officially sanctioned Christianity in Communist China.
He visits state-regulated Christian institutions such as the world's largest Bible printing press in Nanjing, which prints no fewer than one million Bibles every month.
We also gain access to training facilities for pastors built with government money, and visit the building site of a new ‘Chinese megachurch’ that will seat 5,000 worshippers.
The Communist rulers in Beijing keep a close eye on these burgeoning activities.
But why have they decided that it is in their interest to co-operate with Christians?
While China's repression of underground churches is well known, this programme provides rare insights into the enormous growth of government-sanctioned Christianity.
Students at the National Catholic Seminary, Beijing