An ancient Chinese tower tilting at a perilous angle has earned comparisons with Italy's Leaning Tower of Pisa and worried a school in its shadow, state media reported Thursday.

The Wanshou Temple Tower in the central city of Xi'an, which dates back to the Ming Dynasty (1368-1644), began to lean dramatically after a heavy rainstorm in May 2011, state-run China Radio National said.

Local authorities erected a steel frame to support the tower, which looms over the school athletics field. The building faces stiff competition for the title of China's leaning tower.

A slanting structure in Sichuan province and a 900-year-old pagoda in Shanghai, which leans at a steeper angle than the Tower of Pisa, also claim the honour.AFP