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Customs authorities in China in eastern Shandong province 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, officials stated, also "omitted important islands" in the disputed South China Sea waters, where Beijing's claims clash with those of its neighbors, including the Philippines and Vietnam.

The "violating" maps, destined for overseas markets, cannot be sold because they "threaten national unity, sovereignty and territorial integrity" of the People's Republic of China, customs representatives stated.

Cartographic materials are a contentious issue for China and its regional competitors for coral formations, maritime features and rock formations in the disputed maritime region.

Specific Compliance Issues

Customs authorities stated that the maps also failed to include the nine-segment line, which defines China's territorial assertion over the vast majority of the South China Sea.

The demarcation includes nine lines which stretches numerous nautical miles south and east from its most southerly province of Hainan.

The seized maps also failed to indicate the oceanic demarcation between China and the Japanese archipelago, authorities said.

Cross-Strait Situation

Authorities said the maps mislabelled "the Taiwan region", without clarifying what exactly the incorrect labeling was.

The Chinese government sees self-ruled Taiwan as its sovereign land and has not ruled out the use of military action to unify with the island. But Taiwanese authorities considers itself separate from the Chinese mainland, with its own governing document and elected leadership.

Geopolitical Disputes

Tensions in the South China Sea flare up occasionally - in recent days over the weekend, when ships from China and the Philippine government participated in another incident.

Manila alleged a China's maritime craft of intentionally colliding with and using water cannons at a official Philippine ship.

But Chinese officials claimed the incident happened after the vessel from the Philippines failed to heed continual notices and "dangerously approached" the Chinese vessel.

Historical Similar Cases

The Philippine government and Vietnam are also highly vigilant to portrayals of the disputed maritime region in maps.

The popular motion picture from 2023 was banned in Vietnam and edited in the Philippine release for displaying a maritime chart with the nine-segment boundary.

The declaration from China Customs did not indicate where the seized maps were intended to be sold. The country produces much of the global merchandise, from holiday decorations to stationery.

The seizure of "non-compliant cartographic materials" by customs officials is frequently occurring - though the quantity of the maps intercepted in Shandong easily eclipses past seizures. Goods that fail inspection at the border control are destroyed.

In March, customs officers at an airport in Qingdao confiscated a batch of 143 marine maps that included "clear mistakes" in the territorial boundaries.

In late summer, customs officers in Hebei province intercepted a pair of "violating cartographic materials" that, besides other problems, contained a "misdrawing" of the the Tibet region's limits.