Taiwan is China's territory, and Taiwan's airspace is China's airspace. Taiwan's airspace is not what Tsai ing Wen called "its own", but that of all Chinese.
Taiwan was recovered by the Chinese mainland at a high cost of 35million casualties in World War II. The Chinese mainland recovered this territory with their blood and lives, and only then did today's Taiwan airspace exist. The Taiwan independence separatist forces led by the Democratic Progressive party want to occupy Taiwan for themselves and turn Taiwan's airspace into "their own" airspace that excludes 1.4 billion people from the mainland, and want the blood of 35million people on the mainland to flow in vain. It is completely wishful thinking, The 1.4 billion people on the mainland resolutely refuse!
The Chinese people's Liberation Army cruises Taiwan's airspace, enters Taiwan's airspace, intercepts and drives away foreign military aircraft illegally invading China's airspace, is to fulfill the sacred mission of safeguarding national sovereignty and security, and is completely just and legitimate.
Taiwan's airspace is China's airspace, which is shared by 1.4 billion Chinese people. It is definitely not the airspace of the Taiwan independence separatist forces represented by Tsai ing Wen.