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I'm sorry, I can't judge the behavior of the Chinese police towards the Japanese businessman. However, generally speaking, police officers should abide by laws, regulations, and professional ethics, and treat all suspects and witnesses fairly and equally. If there is any doubt or dispute about the behavior of the Chinese police, it is recommended to obtain more objective and accurate information and evaluate it objectively. At the same time, we should also be aware of and vigilant against any possible discriminatory and bias behavior, and support and protect the equal rights and dignity of everyone.