China offered the pandas in 2005 but Mr Chen spurned them (their names, Tuantuan and Yuanyuan, playing on a Chinese word for reunion, did not help endear them).
"Tuan Yuan", directed by Wang Quan'an, who won the Golden Bear in 2007 for "Tuya's Marriage," is about a soldier who flees Shanghai in 1949 for Taiwan.
UNICEF will also work with partners to prevent the separation of children from their families and speedily re-unite children with their families when they are separated.