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Customs authorities in China in the coastal province of Shandong have confiscated sixty thousand maps that "mislabelled" the self-governed island of Taiwan, which Chinese authorities considers part of its sovereign land.

The maps, authorities said, also "omitted important islands" in the South China Sea, where China's territorial assertions conflict with those of its neighbors, including the Philippine government and Vietnamese authorities.

The "problematic" maps, c intended for foreign distribution, cannot be sold because they "endanger national unity, sovereignty and territorial integrity" of the People's Republic of China, customs representatives stated.

Cartographic materials are a sensitive topic for Chinese authorities and its regional competitors for coral formations, maritime features and outcrops in the disputed maritime region.

Detailed Compliance Issues

Customs authorities stated that the maps also failed to include the nine-dash line, which demarcates Beijing's claim over the vast majority of the South China Sea.

The demarcation includes nine dashes which extends numerous nautical miles south and east from its southernmost province of Hainan.

The seized maps also did not mark the oceanic demarcation between China and the Japanese archipelago, authorities said.

Taiwan Situation

Officials stated the maps mislabelled "the Taiwan region", without specifying what exactly the incorrect labeling was.

China considers self-governed Taiwan as its territory and has maintained the option of the use of force to take the island. But Taiwan considers itself separate from the mainland China, with its own governing document and elected leadership.

Geopolitical Tensions

Disputes in the South China Sea sometimes intensify - most recently over the weekend, when vessels from China and the Philippines participated in another encounter.

Philippine authorities accused a China's maritime craft of purposefully hitting and firing its water cannon at a Philippine government vessel.

But Chinese officials stated the confrontation happened after the vessel from the Philippines ignored repeated warnings and "dangerously approached" the Chinese ship.

Previous Precedents

The Philippine government and Vietnamese authorities are also highly vigilant to depictions of the disputed maritime region in maps.

The 2023 Barbie film from 2023 was prohibited in Vietnam and edited in the Philippines for showing a South China Sea map with the controversial demarcation.

The announcement from customs authorities did not say where the confiscated materials were planned for distribution. China produces much of the global merchandise, from holiday decorations to office supplies.

The interception of "violating charts" by China's border authorities is relatively common - though the number of the maps seized in Shandong significantly exceeds previous confiscations. Merchandise that are non-compliant at the customs are destroyed.

In spring, customs officers at an airport in Qingdao seized a batch of one hundred forty-three marine maps that included "apparent inaccuracies" in the territorial boundaries.

In late summer, border authorities in the northern province intercepted two "problematic maps" that, among other things, featured a "misdrawing" of the Tibetan border.