A video went viral on Chinese social media from Thursday shows a toddler picking up a steel pipe trying to defend his grandma from a group of Chengguan, the urban management force installed in Chinese cities whose job ranges from clamping down on illegal street vendors to enforcing rules on city sanitation, landscaping and parking. The toddler was captured shouting `don`t touch my grandma! Go away, don`t touch my grandma!` repeatedly while he held a steel pipe measured some twice his height, trying to push the Chengguan away.