Tongwen Guan was created in 1862.
Marail Guan was created in 1776.
Black Guan was created in 1867.
Wattled Guan was created in 1828.
Andean Guan was created in 1856.
Dusky-legged Guan was created in 1815.
Chestnut-bellied Guan was created in 1870.
Trinidad Piping Guan was created in 1784.
Sickle-winged Guan was created in 1828.
Tongwen Chen has written: 'Optimal sampled-data control systems' -- subject(s): Automatic control, Discrete-time systems
Zhen Guan Zhi Zhi was created in 2006.
Red-throated Piping Guan was created in 1858.
Tan Teck Guan Building was created in 1911.