At present, catkins in this city are fully developed. Within a week starting from today (12th), catkins will be flying in most areas of the city. It is expected that driven by sunny and hot weather in the future, the central urban area will enter the peak flying period of catkins from today, and the catkins will enter the initial flying period at the same time. The four districts around the city will gradually enter the peak flying period from the 15th to the 17th, and catkins will enter the initial flying period at the same time.