China reportedly is building its fourth aircraft carrier -- a move aimed at boosting its naval power in the Asia-Pacific region. Construction of the fourth ship, which has already been delayed for two years, resumed earlier this year.

China's fourth aircraft carrier 'likely to be nuclear powered'

A newly commissioned Chinese aircraft carrier sailed through the Taiwan Strait for a second time Thursday, Taipei's defence ministry said, just weeks before the island goes to polls to elect a new president.

China aircraft carrier sails through Taiwan Strait again

China's first domestically built aircraft carrier was commissioned to the Army, state media reported. Last month, China had confirmed that the new carrier had passed the South China Sea for tests and had taken part in exercises in the Taiwan Straits.

China's first domestically built aircraft carrier enters service

China confirmed on Monday that its first domestically-built aircraft carrier had sailed through the Taiwan Strait for "routine" training and tests. "It is not aimed at any specific target and has nothing to do with the current situation," navy spokesman Cheng Dewei said in the official social media account, AFP reported.

China confirms first domestically-built aircraft carrier sailed through Taiwan Strait

The sea trials started on May 13 which mainly tested the reliability and stability of the carrier's power system and other equipment.

Watch: China's first indigenously built aircraft carrier completes sea test

This is China's second carrier after the earlier vessel launched in 2012 which was mainly a Soviet-era refit.

Watch: After setting up indigenously-built aircraft carrier, China eyes bigger vessel

The Chinese government had said that the new carrier’s design draws on experiences from the country’s first carrier - the Liaoning.

China's aircraft carrier superior to India's INS Vikrant: Chinese experts

The new carrier will be able to operate China's Shenyang J-15 fighter jets

China launches first domestically-built aircraft carrier

The defence ministry issued a statement saying that 'the military is monitoring the whole situation and will act as necessary'.

Tension grips Taiwan as Chinese warship enters strait