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Chinese customs officers in the coastal province of Shandong have confiscated sixty thousand maps that "improperly identified" the self-ruled island of Taiwan, which Beijing claims as part of its territory.

The maps, authorities said, also "failed to include important islands" in the disputed South China Sea waters, where China's territorial assertions conflict with those of its neighbors, including the Philippines and Vietnamese authorities.

The "non-compliant" maps, meant for export, cannot be sold because they "endanger national unity, sovereignty and territorial integrity" of the People's Republic of China, officials confirmed.

Maps are a delicate subject for China and its rivals for coral formations, maritime features and outcrops in the disputed maritime region.

Specific Violations

Customs authorities explained that the maps also omitted the nine-segment line, which outlines Beijing's claim over nearly the entire South China Sea.

The boundary consists of nine dashes which stretches a significant distance southeastern direction from its southern province of Hainan.

The seized maps also did not mark the maritime boundary between mainland China and Japan, officials confirmed.

Cross-Strait Situation

Officials stated the maps improperly identified "the Taiwan region", without clarifying what exactly the incorrect labeling was.

China sees self-governed Taiwan as its sovereign land and has kept open the possibility of the use of force to unify with the island. But Taiwanese authorities considers itself distinct from the Chinese mainland, with its own governing document and democratically-elected leaders.

Regional Tensions

Tensions in the South China Sea flare up occasionally - just recently over the weekend, when maritime craft from China and the Philippine government figured in another incident.

Philippine authorities alleged a Chinese vessel of deliberately ramming and deploying water jets at a government-owned Philippine craft.

But Beijing said the confrontation happened after the Philippine ship ignored repeated warnings and "moved perilously near" the Chinese ship.

Historical Precedents

The Philippine government and Vietnamese authorities are also particularly sensitive to representations of the disputed maritime region in cartographic materials.

The 2023 Barbie film from 2023 was prohibited in the Vietnamese market and modified in the Philippine release for depicting a maritime chart with the nine dash line.

The declaration from customs authorities did not specify where the intercepted items were destined for sale. The country produces much of the international products, from holiday decorations to office supplies.

The seizure of "violating charts" by China's border authorities is frequently occurring - though the amount of the maps intercepted in Shandong easily eclipses previous confiscations. Merchandise that are non-compliant at the customs are eliminated.

In spring, customs officers at an airport in the coastal city confiscated a shipment of 143 marine maps that contained "obvious errors" in the national borders.

In August, border authorities in the northern province confiscated two "problematic maps" that, among other things, included a "improper representation" of the the Tibet region's limits.