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"Children are precocious now; it's necessary to adjust the age of criminal responsibility," he said.

"China promises a bright future to researchers now, especially in the area of energy storage. The gap between China and the US is smaller and smaller and China has been investing heavily in scientific research," he said.

"By the end of this year, (I) aim to make an irreversible advance" in the denuclearization and the peace settlement, Moon said, stressing that building trust among the countries concerned would be significant.

"But there are some issues that divide us," including the set of tariffs China imposes on US exports, some standards China imposes particularly on food items, and intellectual property rights, the technology transfers and cyber security, which Ross said are "essentially the basis" for the US' planned hefty tariffs on billion worth of Chinese goods.

"China has a population of 1.4 billion, with 4 million new cancer cases arising annually, but around 90 percent of innovative and patented cancer drugs in China are imported, and highly-priced," he said.