A heavy fog shrouded many parts of China's Shandong province Saturday, closing highways and delaying flights, authorities said.
The provincial meteorological observatory issued a yellow alert for heavy fog Saturday morning, forecasting visibility of less than 500 metres in its northwestern and northern areas, Xinhua reported.
More than 70 toll stations of 11 highways in Shandong had to be temporarily closed.
Flights were affected at the international airport of the provincial capital Jinan due to low visibility. About 20 flights were postponed or cancelled.
Chinese capital Beijing saw a clear day Saturday after two days of choking smoggy weather.
But Beijing and its neighbouring areas will likely soon face another bout of persistent heavy air pollution for up to five days, according to the ministry of environmental protection.
