[{'role': 'user', 'content': "Analyze the following clause from a privacy policy and determine if it's fair or unfair. Also identify any privacy practices mentioned: If you are a user from Mainland China, please send us your comments and responses to the following address: The Legal Department, Alibaba Advertising Co., Ltd., No. 699, Wangshang Road, Bingjiang District, Hangzhou, the People's Republic of China."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]