It's over. The first wave of epidemic in Zaozhuang has infected more than 80% people, so the peak of regional COVID-19 infection in Zaozhuang has passed. Zaozhuang, a prefecture-level city in Shandong Province, is an important modern coal chemical, energy, building materials and machinery manufacturing base in Shandong Province, an emerging scientific and technological innovation base and one of the central cities in southern Shandong.