Expedition! Expedition! Directed by, starring ZhangFeng yi,,, Cao Cao and Zhang. The drama tells the story that Duan's Yunnan army, which had been idle for many years, was sent to the front when the 194 1 Yunnan-Vietnam railway was cut off, the strategic plan of the Japanese army sweeping Southeast Asia was obvious, and the Yunnan-Myanmar highway, the only blood connecting China with the outside world, was in jeopardy.