Workers in the picture are paving roads with bituminous materials. Since the Mainland quarries were once closed, the aggregates that are used to produce bituminous materials could not be supplied, which in turn affected the relevant work procedures.

Workers in the picture are paving roads with bituminous materials. Since the Mainland quarries were once closed, the aggregates that are used to produce bituminous materials could not be supplied, which in turn affected the relevant work procedures.

Workers in the picture are paving roads with bituminous materials. Since the Mainland quarries were once closed, the aggregates that are used to produce bituminous materials could not be supplied, which in turn affected the relevant work procedures.