警察蜀黍我们做朋友吧
[jĭng chá shŭ shŭ wŏ men zuò péng yŏu ba]
It has a friendly and intimate sense, like saying 'Dear policeman, let's be friends.' The word '蜀黍' (shushu) is an affectionate and respectful term used for middle-aged men in China, particularly policemen. It originated from internet slang.