I've just been catching up on a few oldies (some without subs), so here's my little list, including Hong Kong, and a couple of Taiwanese co-productions set on the mainland...

Spring in a Small Town (Fei Mu, 194 
Red Sorghum (Zhang Yimou, 1987)
Crouching Tiger Hidden Dragon (Ang Lee, 2000)
Chungking Express (Wong Kar-wai, 1994)
Raise the Red Lantern (Zhang Yimou, 1991)
Two Stage Sisters (Xie Jin, 1965)
In the Mood for Love (Wong Kar-wai, 2000)
The Goddess (Wu Yonggang, 1934)
To Live (Zhang Yimou, 1994)
A Touch of Zen (King Hu, 1969)

The Lin Family Shop (Zhang Shuihua, 1959)
Suzhou River (Lou Ye, 2000)
Rouge (Kwan, 1987)
Platform (Jia Zhangke, 2000)
Horse Thief (Tian Zhuangzhuang, 1986)
House of the Flying Daggers (Zhang Yimou, 2004)
Little Toys (Sun Yu, 1933)
Life on a String (Chen Kaige, 1991)
2046 (Wong Kar-wai, 2004)
Street Angel (Yuan Mushi, 1937)
The Blue Kite (Tian Zhuangzhuang, 1993)

this is likely to be the Chinese century, and there should be ever more top films, as well as wider interest in the country's earlier cinema history. Hollywood watch out!