From left: Chinese-American film director Christine Choy, mainland film director Patric Lee and Nancy Shen from Hong Kong who is working as producer at Sunday Morning were invited by MatCH Film Association to share their insights into the future of Chinese films with students at Columbia University on Tuesday. Choy told students that it is very important to free their ideas to make a really good movie. "You should open your heart and embrace the world, do not let any ideology limit your ideas," she said. [Photo by Zhang Fan / CHINA DAILY]