Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Two Advances for Chinese Navy after Monthlong Aircraft Carrier Voyage near Japan, Taiwan Ralph Jennings TAIPEI, TAIWAN - China's navy just learned from a monthlong aircraft carrier training mission how to keep troops safe from COVID-19 and what it would be like to spar with Japan or Taiwan, analysts believe. The Liaoning aircraft carrier returned to port in eastern China April 30 after passing through western Pacific waters near Taiwan and Japan -- putting both on alert due to their political differences with Beijing. Though hardly a first for the carrier, the rising maritime power sent it out for longer this year for more rigorous training. The People's Liberation Army Navy probably did "intensive" logistics and medical support work, with civilian help, to keep its flotilla disease free during the global COVID-19 pandemic, said Andrew Yang, secretary-general of the Chinese Council of Advanced Policy Studies think tank in Taiwan. Naval vessels from Taiwan, the United States and three European countries have been infected this year. The coronavirus that causes COVI9-19 had spread on board because multiple people were stationed there in close quarters. A disease-free voyage means "they can actually cope with very unique and unusual conditions and at the same time they can still make warships operational," Yang said. More longer-term, China's navy took a lesson over the past month in what it would be like to fight Japan, Taiwan or countries that claim the adjacent South China Sea, said Derek Grossman, senior defense analyst with RAND Corp. research institution. China has not fought a war since the 1979 conflict with Vietnam, Grossman noted. "The best place to prepare for realistic combat conditions is in the place where you're going to actually do it, and I think that's a really important aspect that tends to get lost," he said. China's official Xinhua News Agency described the mission as annual with "trans-theater training in the far seas" this year. Itfeatured a"long duration, many subjects, high intensity and complicated air and sea situations," Xinhua said. .