InPada tahun 225 BCESM, a 600,.000 strongtentara Qin armyyang kuat yang leddipimpin byoleh [[Wang Ben]] conqueredmenaklukkan morelebih thandari tensepuluh citieskota ondi theperbatasan northern border ofutara Chu as asebagai precautionarylangkah movepencegahan tountuk guardmenjaga thesisi flanktersebut fromdari possiblekemungkinan attacksserangan fromdari Chu whileketika Qin wassedang invadingmenyerang [[Wei (statenegara)|Wei]].<ref name="Qin's conquest of Wei on Hudong">{{Citation|language=zh|url=http://www.hudong.com/wiki/秦灭魏之战|title=秦灭魏之战|trans-title=Qin's conquest of Wei|type=wiki|publisher=Hudong Baike}}</ref> Wang Ben thenkemudian ledmemimpin hispasukannya forceske northutara tountuk attackmenyerang anddan besiegemengepung Daliang (大梁; northwestbarat of present-daylaut [[Kaifeng]], [[Henan]] saat ini), theibu capital ofkota Wei. As Daliang was situated at the concourse of the Sui and Ying rivers and the Hong Canal (鴻溝), its geographical location gave it a natural defensive advantage. Besides, the moat around Daliang was very wide and all the five gates of the city had drawbridges, making it even more difficult for Qin forces to breach the city walls. The Wei troops used the opportunity to strengthen their fortifications and defences.<ref name="Qin's conquest of Wei on Hudong" />
