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宰客 swindle money out of customers

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沾光 benefit from one's association

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占便宜 profit at others' expense

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纸包不住火 Truth will come to light sooner or later.

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知己知彼,百战不殆 Know the enemy and know yourself, and you can fight a hundred battles with no danger of defeat.

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智囊团、思想库 the brain trust；think tank

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中国结 Chinese knot

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追星族 star fan; groupie

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自学成才 become well-educated through self-study

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自作自受 stew in one's own juice

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走过场 go through the motions

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走后门 get in by the back door

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走穴 "(actors, singers, etc.) perform for outside salary income without approval by the unit they belong to "

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左右为难 between the devil and the deep blue sea; between the rock and the hard place