“Directory of Overseas Chinese Labors” is a roll of the contract labors（“piglets”）in Cuba from Chaozhou Prefecture of Qing Dynasty which issued at 1883. This paper teases out the version form，procedure，content of the book then unscrambles and analyse Zhangxiang’s contract，on the basis of which the paper narrates the stories of the miserable sufferings of the contract labors. Then this paper，based on the Shantou’s “Lingdong Daily” which was published in the late Qing Dynasty，analyses the origin of the word “piglets”，the human trafficking problem and the gentry’s attitude to contract labors.