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Another payload is the high-performance propellant, developed by the US Air Force Research Laboratory. The "green" and more effective fuel can be an alternative to hydrazine, the highly toxic fuel, according to NASA.

Any slight decline in coal prices would squeeze profits of Chinese coal companies but won't cause huge losses, Zhang said.

Another factor is that some young people's understanding of these values is superficial, Yeung said, adding that they don't realize democracy has flaws and limits on freedom.

Another favorite is the oyster.

Apart from the above, China's high-speed rail as well as the e-commerce scheme have also been introduced in many countries, bringing more convenience and benefits to other parts of the world.