I think this is on the Hall of Buddhist Tenets, which was literally
covered with these little Buddha statues. All those within reach of
ground level were headless, sadly. We attributed this to zealous
tourists, but I have since been reliably informed that the removal of
such heads was a widespread and deliberate act of state sanctioned
vandalism perpetrated during the Cultural Revolution, and indeed there
would have been a regional administrator responsible for this very
task. Like, wow.