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"The farmers tried a variety of plants at first, including traditional Chinese herbs, and corn, but the yields were less than satisfactory," the official said.

On Feb. 7, Air China, the country's flagship carrier, sent 668 medical personnel and 28 tonnes of emergency medical supplies with two charter flights to Wuhan.

Last year, some cities tightened the regulation of the property market while others moderately relaxed the purchase restrictions. Some cities have rolled out preferential policies to lure and retain skilled workers.

In Li's message, he said that under the new circumstances, the Chinese side is willing to work with the Vietnamese side, in a strategic approach to simultaneously promote maritime, land and financial cooperation, to deepen the synergy of the China-proposed Belt and Road Initiative and Vietnam's "Two Corridors and One Economic Circle" plan, as well as the collaboration in key areas such as industrial capacity and infrastructure construction.