3. "Cliff Walkers"

Zhang Yimou, one of China's most renowned directors, made the spy thriller "Cliff Walkers" to commemorate China's secret heroes who traded their lives for today's peace. Starring Zhang Yi, Yu Hewei, and Liu Haoran, the suspenseful secret agent film is one of the best spy films with a textbook aesthetic style from Zhang. It prompts the audience to look inside and feel grateful for sacrifices and struggles by those nameless martyrs. It is also Zhang's first try in this genre, and it grossed 1.19 billion yuan in the Chinese market and became the biggest grossing film in his career.