[Serbian President orders the army to enter the highest state of combat readiness] May 26, according to the Serbian Nantong news agency on the 26th, Serbian President Vucic ordered on the same day to raise the combat readiness of the Serbian army to the highest level and urgently move in the direction of the administrative line with Kosovo. It is reported that Vucic's improvement of the combat readiness of Serbian troops is related to the sudden tension in Kosovo. On the same day, Serbs in the Zweichan Serb district in northern Kosovo clashed with the Kosovo Albanian police, who used tear gas and explosive grenades during the conflict and broke into the administrative building of the Zweichen district. At present, the Zweichan district has been cordoned off by the Kosovo Special Police. Kosovo, an autonomous province of Serbia, was managed by the United Nations after the end of the Kosovo war in 1999. In 2008, Kosovo unilaterally declared its independence, and Serbia always insisted on sovereignty over Kosovo.