This cover commemorates 2 Chinese New Year celebrations from Taiwan: the Year of the Horse (2014) and the Lantern Festival.
Country: Taiwan (Republic of China)
Date of Issue (Stamps): 2nd December 2013
Date of Cover: 14th February 2014 (Taiwan Lantern Festival)
Transit: 14 days over 1476 miles / 2375 km = 4.4 mph / 7.1 kph
The stamps on this cover were issued in 2013 in anticipation of the Year of the Horse in 2014. The cover itself commemorates the 2014 Lantern Festival in Taiwan, and the cancellation commemorates the opening day of the festival. The Lantern Festival brings the Chinese New Year to a close, ushering in the Year of the Horse, hence the use of these stamps.
Thanks to Douglas for this cover.