On July 6, 2025, China announced the opening of the W121 extension of the M503 flight route, which runs close to Taiwan. This move has increased tensions between China and Taiwan. Taiwan views the extension as a provocative action.
The announcement coincides with Taiwan's annual Han Kuang military exercises, scheduled to begin on July 9, 2025. These exercises will simulate responses to potential Chinese military incursions and involve over 22,000 reservists. The exercises will feature new U.S.-made HIMARS and domestically developed Sky Sword surface-to-air missiles.
The extension of the M503 route and the upcoming exercises highlight the escalating military tensions in the Taiwan Strait. The international community is closely monitoring these developments due to their implications for regional stability.