They are showing videos of panda pornography to pandas to increase their sex drive so that they conceive. From one article:
Giant pandas, especially those in captivity, have such low sexual desires it is threatening their future, prompting workers to turn to artificial insemination to keep the endangered species going.
The Chengdu Giant Panda Breeding and Research Base in Sichuan Province is also in on the act, showing sex education films once in the morning and again in the evening.
"Through this kind of sex education, we expect to arouse the sexual instincts of giant pandas, enhance their natural mating ability and raise their reproductive capacity," said Zhang Hemin, director of the China Giant Panda Breeding and Research Center.
A video report at at CNN.
Yaakov Avinu did something similar. In Bereishit 20: