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One-meter bars were set at the shop's sales counters and sanitizers were provided, while staff will keep customer flows at a safe distance and disinfect public areas regularly every day, Zhang said.
He also called for strengthened international cooperation in the development of antiviral drugs and vaccines.
For his part, Johnson said he congratulates the Chinese government and people on the remarkable achievements they have made in epidemic prevention and control with strenuous efforts and enormous sacrifices.
"In recent years, under the framework of the Forum on China-Africa Cooperation (FOCAC), the cooperation between our two countries has entered a fast track," Zhang said, adding that jointly building the Belt and Road is another big step in enhancing practical bilateral cooperation.
