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"All the 61 elementary particles predicted by the standard model of particle physics have been found. Dark matter particles are beyond the list. So if we find a new elementary particle, it will be a breakthrough in physics," he added.

Xi made the remarks while meeting with Canadian Prime Minister Justin Trudeau, who is paying an official visit to China from Dec. 3 to 7.

Xinhua sportswriters Zhu Hong and Guo Jingdan contributed to this story.

China will push for nationwide implementation of a pre-establishment national treatment system as well as a negative list that determines where foreign participation is prohibited or limited, according to the Central Economic Work Conference, which concluded Wednesday.

Che Lu has more than 10 years of gym experience. The gymrat has noticed a gradual change in fitness diet recent years in China.