Complex sentence: China has a history of female infanticide spanning 2,000 years, with the arrival of Christian missionaries in the late sixteenth century the missionaries discovered female infanticide was being practiced, newborns were seen thrown into rivers or onto rubbish piles.
Split into simpler sentences: China has a history of female infanticide spanning 2,000 years. With the arrival of Christian missionaries in the late sixteenth century, the missionaries discovered female infanticide was being practiced-newborns were seen thrown into rivers or onto rubbish piles.