|Name||No||Yard No||Builder||Laid down||Launched||Comp||Fate|
|永丰 [Yung Feng], 3.1925- 中山 [Chung Shan]||Kawasaki, Kobe, Japan||1912||1913||sunk 24.10.1938|
|永翔 [Yung Hsiang]||Kawasaki, Kobe, Japan||30.3.1912||1913||scuttled 26.9.1937|
|Displacement normal, t||830|
|Displacement full, t||1020|
|Length, m||62.5 pp 65.8 oa|
|No of shafts||2|
|Machinery||2 VTE, 2 watertube boilers|
|Power, h. p.||1350|
|Max speed, kts||13|
|Fuel, t||coal 190|
|Armour, mm||deck: 25|
|Armament||1 x 1 - 105/37 SK L/40 C/91, 1 x 1 - 76/50 Armstrong 14pdr QF, 4 x 1 - 47/40 Hotchkiss, 2 x 1 - 37/27 Maxim|
Ordered under the 1910 program. Design was developed on basis of Japanese gunboat Saga. Seaworthy gunboats with armoured deck and high forecastle.
In 1922 Sun Yatsen onboard Yung Feng escaped from Canton. After his death in March, 1925, Yung Feng was renamed into his honour Chung Shan ("Median Mountain", poetic pseudonym, accepted by Yatsen during his emigration in Japan). In October, 1929 this gunboat was sunk at Canton as result of ammunition explosion, but was raised and repaired by Kiangnan in Shanghai. Yung Hsiang 26.9.1937 was scuttled at Tsingtao. Subsequently she was salvaged and towed off to Japan, in 1946 she was returned to China; in 1949 she escaped to Taiwan where served up to late 1950s. Chung Shan was sunk 24.10.1938 by Japanese aircraft on Yangtze between Hankow (Wuhan) and Yueyang.