围城打援 wéichéngdǎyuán to besiege and strike the relief force Origin Definitions Defs Strokes Stroke Words Sentences Sents 围城 圍城 wéichéng to besiege a city; siege to surround or encircle a city with military force打援 dǎyuán to attack reinforcements To attack or intercept enemy reinforcements, often as part of the tactic of besieging a city to strike those coming to its aid.