Rubuta ci gaba ga wannan sakin layi - A shekara ta 1937, Wang ya jagoranci tawagarsa a yakin Shanghai. Kwamandan rundunarsa shi ne Zhang Lingfu, wanda ya fitar da shi daga kurkuku. A karshen watan Nuwamba, sojojin kasar Sin sun rasa yakin da aka yi a Shanghai da kuma rundunar sojojin kasar Sin ta Tsakiya a karkashin Janar Iwane Matsui sun ci gaba zuwa Nanjing. A lokacin yakin Nanjing, rundunar ta 51 ta Wang ta yi asarar rayuka da yawa kuma babban hafsansa Janar Tang Shengzhi ya tsere daga garin ba tare da sanar da shi da sauran manyan kwamandojin ba. Wang da kyar ya tsere daga garin kuma sojoji 3,000 ne kawai a karkashin jagorancinsa suka yi nasarar tserewa daga harin na Japan. A cikin 1938 ya shiga cikin Yaƙin Lanfeng don yaƙi da rukunin 14 na Japan (Sojojin Jafananci na Imperial) wanda Janar Kenji Doihara ke jagoranta, ɗaya daga cikin manyan masu tunanin Manzuriya. Rashin dakatar da hare-haren Japan ya kuma sa gwamnatin kasa ta bude dams a kan Kogin Yellow, wanda ya haifar da ambaliyar Kogin Yellow na 1938
Ka yi haƙuri. A lokacin yakin Wanjialing, rukunin Wang ya yi yaƙi da ƙoƙarin Jafananci na tsallakewa daga kewayewar Sinawa, wanda a ciki aka kusan shafe Rukunin na 106 (Sojojin Jafananci na Jafananci) a ƙarƙashin Laftanar Janar Junrokurō Matsuura. A cikin 1939, Wang ya jagoranci ƙungiyarsa don shiga cikin Yaƙin Nanchang, amma sojojin China sun kasa riƙe garin. Wang, duk da haka, ya bambanta kansa a lokacin yakin Changsha kuma an ba shi mukamin kwamandan rundunar ta 74. A karkashin jagorancinsa, rundunar ta 74 ta zama daya daga cikin manyan rundunonin sojojin gwamnatin kasar Sin kuma ta yi yaƙi a kusan kowane rikici a lokacin da ya rage na yakin. A karshen yakin, Janar Wang ya ci gaba da zama kwamandan rundunar soji ta 4 kuma ya zama memba na kwamitin tsakiya na KMT.