What happened when British and French troops captured Beijing in 1860?

In October 1860, during the Second Opium War, British and French forces captured Beijing after the Chinese government refused to ratify the Treaties of Tianjin.312

Following the capture of the city, the allied troops plundered and burned the Yuanming Garden, also known as the Old Summer Palace. This act of destruction was a significant event in the conflict, which ultimately forced the Qing dynasty to sign the Beijing Convention later that month. Under the terms of this convention, China agreed to honor the previously negotiated treaties, which included granting foreign envoys the right to reside in Beijing, opening additional ports to trade, and ceding the southern portion of the Kowloon Peninsula to the British.3412