TAIPEI – Taiwan’s government has expressed anger after China “unilaterally” changed a flight path close to the sensitive “median line” in the Taiwan Strait, saying it appeared to be a deliberate attempt to change the status quo for possible military means.
China’s civil aviation administration said in a short statement late Tuesday that from Thursday it was cancelling an “offset measure” for the southbound operation of the M503 flight route, which is just west of the strait’s median line.
The median line had for years served as an unofficial barrier between Chinese-claimed Taiwan and China, but China says it does not recognize its existence and Chinese warplanes now regularly fly over it as Beijing seeks to pressure Taipei to accept its sovereignty claims.
China also said it was opening routes from west to east — in other words in the direction of Taiwan — on two flight paths from the Chinese cities of Xiamen and Fuzhou, which have regular flights to Taiwan and are close to the Taiwanese-controlled island groups of Kinmen and Matsu.
Taiwan’s civil aviation administration and China-policy making Mainland Affairs Council both labelled the moves as “unilateral” and said that they strongly protested it.
The Mainland Affairs Council said China was ignoring flight safety, disrespecting Taiwan and trying to “package” civil aviation for political or military considerations to potentially change the status quo in the strait.
“If the mainland side clings obstinately to its course, it must bear any serious consequences affecting cross-strait relations,” it said.
Chieh Chung, a military researcher at Taiwan’s National Policy Foundation, said the new route would be about 7 kilometers from the median line, which would squeeze the pre-warning and reaction time for Taiwan’s air defenses.
“It is trying to completely eliminate and deny the existence of the median line,” he said.
Taiwan’s defense ministry said China’s “rude and unreasonable” actions can easily lead to an increase in tensions.
“For unknown aircraft entering our air defense identification zone (ADIZ), they will be dealt with in accordance with operating procedures and emergency handling regulations to ensure the safety of our airspace,” it added.
The ADIZ is a broad area Taiwan monitors and patrols to give its forces more time to respond to threats, and so far Chinese military aircraft have not entered Taiwanese territorial airspace.
China has downplayed the furor.
Its Taiwan Affairs Office described the changes as “routine” to help alleviate pressure on airspace, and that China had no need to discuss this first with Taiwan.
Speaking at a regular news conference in Beijing on Wednesday, Chen Binhua, a spokesperson for the office, said the “so-called median line does not exist.”
“The M503 route is for civil aviation and is in the Shanghai flight information region. It is to alleviate congestion for the related airspace and routes, and ensures aviation safety,” he said.
The M503 route is mostly used by Chinese airlines and also by foreign airlines going to and from cities such as Shanghai to Southeast Asia.
Flights to and from Taiwan and China’s Xiamen and Fuzhou take a circuitous route skirting the median line, rather than flying directly across the strait.
Taiwan has complained about the M503 route before, in 2018, when it said China opened the northbound part of it without first informing Taipei in contravention of a 2015 deal to first discuss such flight paths.
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