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BBCParents who lost their children in China's earthquake fear they will not be allowed to properly commemorate the disaster's first anniversary.
Many parents want to return to the site of the schools in Sichuan that killed their children when they collapsed.
But the authorities have previously stopped them going to the schools on sensitive occasions, and are said to be monitoring the parents ahead of 12 May.
China has not said how many children were among the 90,000 dead and missing.
The government has admitted that nearly 14,000 schools - some of them poorly or hastily built - were damaged in the magnitude-8 earthquake.
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