网络扫黄 conducted crackdowns on pornography on the Internet
China has conducted crackdowns on pornography on the Internet since 2004 and intensified such efforts in recent years.
自2004年以来，中国多次开展网络扫黄活动，并于近年加大了网络扫黄的力度。
China began carrying out a campaign to rid the country of online pornography.
中国开始了一场网络扫黄运动。
