China rotated troops in its People's Liberation Army garrison in Hong Kong on Thursday, days before protesters planned to hold a march calling for full democracy for the Chinese-ruled city after three months of sometimes violent demonstrations.<br /><br />China's military will make even greater "new" contributions to maintaining Hong Kong's prosperity and stability, state news agency Xinhua cited the People's Liberation Army garrison in the territory as saying.<br /><br />Observers estimate the Hong Kong garrison numbers between 8,000 and 10,000 troops split between bases in southern China and a network of former British army barracks in Hong Kong.