Chinese military rehearsing encirclement of Taiwan

China's military has begun rehearsing the encirclement of Taiwan during three days of military drills.

Beijing - which views Taiwan as a breakaway province of China - called the operation a "stern warning" to the island's government.

The exercises began hours after President Tsai Ing-wen returned from a trip to the United States.

The Taiwanese Defence Ministry said 42 Chinese military planes and eight ships crossed the Taiwan Strait median line.

The line is an unofficial dividing line between Chinese and Taiwanese territory.

Chinese state media said the military drills would "simultaneously organise patrols and advances around Taiwan island, shaping an all-round encirclement and deterrence posture".

It added that "long-range rocket artillery, naval destroyers, missile boats, air force fighters, bombers, jammers and refuellers" had all been deployed by China's military.

Taiwan considers itself a sovereign state, with its own constitution and leaders.

But China sees the island as a breakaway province that will eventually be brought under Beijing's control - by force if necessary.

China's President Xi Jinping has said "reunification" with Taiwan "must be fulfilled".

President Tsai said on Saturday that her government would continue working with the US and other democracies as the island faces "continued authoritarian expansionism" from China.