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First, they fused two chromosomes, then joined this product to another chromosome, and repeated the process in successive rounds until there was only one chromosome left, it said.

China will continue to fulfill its international obligations and be a builder of world peace, contributor to global development, and defender of international order, said the Chinese premier.

China's large aircraft family includes the Y-20 large transport aircraft, C919 large passenger aircraft and AG600 large amphibious aircraft.

"We have the confidence and ability to keep a firm hold on the correct direction, work for the peaceful development of cross-Strait relations, and advance the process toward the peaceful reunification of China," Xi said.