I consider the threat of violence to be violence, so I'm with you, China commits aggressive offenses against Taiwan by threatening anexation. But, a significant nit I have to pick is that China doesn't violate Taiwanese airspace. Doing that could be an act of war and may get a plane shot down. They enter Taiwan's ADIZ, which span Taiwanese airspace, over international waters and even covers about 2/3 of China's Fujian province. ADIZ isn't airspace. It's just the zone that Taiwan monitors.