Weng surrendered his Japanese citizenship in the wake of 1937 ’ s Marco Polo Bridge Incident, and was ultimately killed by poison in Japanese-occupied Changzhou. Prior to his death, he had been working to establish a Taiwan branch of the KMT.
1937 年蘆溝橋事變爆發，翁俊明立即聲明「脫離日本國籍」，然而日本侵華之勢凌厲，翁俊明最終難逃毒手，在日軍占領下的漳州被毒害致死，死前還在全力籌備「國民黨台灣省黨部」成立之事。