节外生枝 [- wài shēnɡ zhī]New problems crop up unexpectedly.; bring up unnecessary ramifications; cause complications; complicate matters; create side issues; deliberately complicate an issue; give rise to other contingencies; proliferate issues and problems; raise obstacles:
•¶ 快要达成协议的时候, 对方又节外生枝。 An agreement was about to be reached when the other side raised new issues.