阅读对话，找出文中的交通规则。
Xiaoling: Welcome to Guangzhou!
Mary: Thank you. I am going to visit some places in Guanghzou.
Xiaoling: There are many busy roads in Guangzhou. Stay safe on the road. Walk on the sidewalk. Cars and buses run fast in the street. It is not safe to walk in the street. Cross the road at the safety crossing. When you cross the road, first look to the left and then to the right.
Mary: It’s different in Australia. We must first look to the right and then to the left because people drive on the left side of the road.
Xiaoling: Safety first. Don’t forget! Have a good time in Guangzhou!
Road safety rules
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