Actor Zhang Yi in Cliff Walkers.LOS ANGELES -- Director Zhang Yimou's spy thriller Cliff Walkers is the Chinese mainland's entry for Best International Feature Film at the 94th Academy Awards, also known as the Oscars. Featuring a star-studded cast of China's leading talent, including Zhang Yi, Yu Hewei and Qin Hailu, Cliff Walkers, set in the 1930s in China's northeast during the Japanese invasion, follows four Chinese special agents who return to China to embark on a sec...