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According to the draft, supervision of vaccines should be tightened and expanded to cover the whole process, from vaccine development to production, distribution and vaccination.

Xi left St. Petersburg to return home on Friday afternoon local time. Senior officials of the Russian Federation government, as well as the governor of Leningrad Oblast and senior officials of the St. Petersburg Municipal Government, saw him off at the airport.

Wang said in recent years the high-level contacts were frequent, and the cooperation in all fields has been constantly deepened, adding he is willing to push for new development of the all-around strategic partnership through his visit.

Nearly 6 million people in the province, which borders Tibet Autonomous Region, only used electricity generated from wind, solar and hydro power stations, from June 6 to 23.

BEIJING, July 1 (Xinhua) -- Several provincial-level regions on Monday started implementing the "China VI" vehicle emission standards ahead of schedule to ramp up efforts against a major source of air pollution.