The Communist government recognizes only bishops within its borders who are designated by the government, but underground churches in -LSB-...] (thebronxchronicle.com)
I've heard of underground churches that would rip pages out of ONE Bible and pass them around from group to group, and memorize those pages. (redeeminggod.com)
South Korean Baptist missionary Kim Jong - Uk is still imprisoned after after receiving a life sentence in June for allegedly working with underground churches. (christianitytoday.com)