Full coverage: 80th Anniversary of the Victory of the Red Army's Long March

Hundreds of memorials have been established in China to remember those who died while fighting for their country.

This is Humen in south China's Guangzhou province. In 1839, a senior official of the Qing Dynasty, Lin Zexu, ordered the burning of nearly 1.2 million kilograms of smuggled opium here. One year later, the First Opium War broke out. The site was refurbished to commemorate people who fought against foreign invaders during the Opium Wars.

What we are looking at here is a memorial for the Long March of Red Army. It is located at Liupanshan in Ningxia Hui Autonomous Region. This year marks the 80th anniversary of the Long March, a famous military maneuver carried out by the Workers' and Peasants' Red Army of the Communist Party of China from 1934 to 1936. The march was a strategic linchpin for the party's eventual victory in the revolution.

This is the North China Military Martyrs' Cemetery located in the city of Shijiazhuang in Hebei Province. There are around 1,000 martyrs laid to rest here. Canadian doctor and internationalist soldier Norman Bethune, and Indian doctor Dwarkanath Shantaram Kotnis, both who helped China during war times, also are laid to rest here.

And this is Yuhuatai Martyr Cemetery in Nanjing, capital of East China's Jiangsu province. It is the largest memorial cemetery in China. The site used to be Kuomintang's execution ground from 1927 until the establishment of People's Republic of China 1949. The area was transformed into a memorial site in 1950.

What we are looking at is the memorial museum for "two bombs, one satellite", which refers to the development of China's first atomic bomb, H-bomb, and satellites in the 1960s and early 1970s. More than 17,000 researchers participated in the "two bombs, one satellite" project, which strengthened China's scientific and defense capabilities. Hundreds died throughout the project, due to accidents and weather-related incidents.