Complex sentence: However, on May 3rd, during negotiations the Japanese resumed fire on Chinese civilians and captured Chinese negotiators led by Kuomintang official Tsai Kung-shih (蔡公時), who was later tortured to death by having his face disfigured.
Split into simpler sentences: However, on May 3rd, during negotiations the Japanese resumed fire on Chinese civilians. They also captured Chinese negotiators led by a Kuomintang official Tsai Kung-shih (蔡公時), who was later tortured to death by having his face disfigured.