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Chinese customs officers in the coastal province of Shandong have intercepted sixty thousand maps that "mislabelled" the self-ruled island of Taiwan, which Chinese authorities claims as part of its sovereign land.

The maps, customs representatives explained, also "omitted important islands" in the South China Sea, where Beijing's claims clash with those of its regional neighbors, including the Philippines and Vietnamese authorities.

The "violating" maps, c intended for foreign distribution, cannot be sold because they "compromise national unity, sovereignty and territorial integrity" of China, officials confirmed.

Cartographic materials are a delicate subject for China and its regional competitors for coral formations, islands and rock formations in the South China Sea.

Specific Violations

Customs authorities stated that the maps also failed to include the nine-segment line, which outlines China's territorial assertion over almost the whole South China Sea.

The boundary consists of nine segments which runs a significant distance southeastern direction from its southern province of Hainan Island.

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

Cross-Strait Situation

Officials stated the maps incorrectly labeled "the Taiwan region", without specifying what exactly the improper identification was.

The Chinese government views self-ruled Taiwan as its territory and has maintained the option of the use of force to unify with the island. But Taiwanese authorities views itself as separate from the mainland China, with its own governing document and elected leadership.

Regional Disputes

Tensions in the disputed maritime region sometimes intensify - just recently over the weekend, when maritime craft from Chinese authorities and the Philippine government figured in another encounter.

Manila alleged a China's maritime craft of deliberately ramming and using water cannons at a government-owned Philippine craft.

But Beijing said the encounter happened after the vessel from the Philippines failed to heed continual notices and "moved perilously near" the Chinese ship.

Historical Precedents

The Philippine government and Vietnamese authorities are also especially concerned to depictions of the South China Sea in cartographic materials.

The Barbie movie from 2023 was banned in the Vietnamese market and edited in the Philippine release for depicting a maritime chart with the nine dash line.

The declaration from customs authorities did not say where the seized maps were planned for distribution. The country provides much of the world's goods, from holiday decorations to stationery.

The seizure of "non-compliant cartographic materials" by Chinese customs officers is not uncommon - though the number of the maps seized in the Shandong region significantly exceeds previous confiscations. Products that do not meet standards at the customs are destroyed.

In spring, border authorities at an air transportation hub in Qingdao seized a batch of 143 marine maps that included "obvious errors" in the sovereign limits.

In August, border authorities in Hebei province intercepted two "non-compliant charts" that, besides other problems, featured a "incorrect depiction" of the Tibetan border.