China's first domestically-built aircraft carrier commenced sea trials on Sunday.
What will be at test is the carrier 's reliability and stability with regards to its power systems.
Construction of the unnamed carrier was completed in April past year.
The Chinese Navy started sea trials of aircraft carrier of its own production of the Type 001A, Xinhua reported.
The new carrier is based on the former Soviet Union's Kuznetsov class design, with a ski jump-style deck for taking off and a conventional oil-fueled steam turbine power plant.
China launched the second aircraft carrier in April 2017 after it commissioned the first carrier, the Liaoning, a refitted Soviet Union-made vessel, in 2012.
However, even with the potential development of further carriers, it could still be years before China's navy is able to deploy its fleet effectively, said Mr Tsang.
The new ship began in 2013.
The new aircraft carrier's first sea voyage is the latest milestone in China's move to modernize its military, a plan which also includes developing stealth jets and anti-satellite missiles.
The still-unnamed carrier was launched this time past year but since then has been undergoing fitting of weapons and other systems and has not yet entered service.
Cui Yiliang, editor-in-chief of Modern Ships magazine, said the new carrier's sea trials will be like those of the Liao-ning, and the total time needed for the trials may be slightly shorter than the Liao-ning's because Navy personnel have had experience obtained through the Liao-ning's operations. The new Chinese carrier can neither sale for longer without refueling than the above mentioned US carriers, nor can it carry as many planes. Chinese experts have said that the missions for the new carrier will be different from those for the Liaoning, which is mainly tasked with testing equipment and weapons as well as training personnel.
Hu Wenming is General Director of China's first homemade aircraft carrier project, and said his team members' average age is only 36.
Zhang Junshe, a researcher with the PLA Naval Military Studies Research Institute, said the Chinese Navy needs at least three aircraft carriers.