Authorities placed roadblocks on main roads leading to the small village of Donglu, just a few hours drive from Beijing, where locals -- an estimated 90 per cent of whom are Catholic -- are fiercely devoted to Mary.
"Police don't let any outsiders into the village during May... It's been like that for years," a local believer who identified herself as Maria said, standing by the towering spires of a church which dominates the village's skyline.
"More than 100 years ago, everyone felt the power of Mary to protect the village, and each generation has passed on the story," Maria said.
A police lock-down lasting the entire month of May, when celebrations dedicated to Mary reach their peak, was established in the 1990s, after tens of thousands of pilgrims from China and abroad gathered in the village, locals say.