Citation Hunt

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page First Opium War:

This text has been unreferenced on Wikipedia for a very long time. If you can't find a source, be bold and remove it!

"

While the British campaigned in the north, Qing Admiral Guan Tianpei greatly reinforced the Qing positions in Humen (Bocca Tigris), suspecting that the British would attempt to force their way up the Pearl River to Guangzhou; sources state that Guan had been preparing for an eventual attack on the position since Napier's attack in 1835. The Humen forts blocked transit of the river, and were garrisoned with 3000 men and 306 cannons. By the time the British fleet was ready for action, 10,000 Qing soldiers were in position to defend Guangzhou and the surrounding area.[1] The British fleet arrived in early January, and began to bombard the Qing defences at Chuenpi after a group of Chinese fire-rafts were sent drifting towards the Royal navy ships.[citation needed]