Welcome to Chongqing ! Chongqing is located in the southwest of China .Chongqing is famous for its foggy weather in spring and winter days, which gives this city a nickname of "foggy city" .
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Mary is a little girl living in Shanghai. On the Saturday morning she went to the park by the Huangpu river with her father and mother. When they reached to the river side she spotted something strange floating on the river. She asked her parents what those floating objects were. After a minutes examining her parents told her those were dead pigs. 'Should we call someone or police to get them out of the river?' , asked Mary. 'That is a good idea' said her mother. Then they called police and soon they found a group of people starting to clean the river. That evening Mary heard the news about pigs in the river. She felt happy that she didn't an important thing on that day.