Daily Chinese Idiom Guessing Game
Describes something that is in the process of vigorous development and has not yet reached its peak.
方正在；兴兴起；艾停止。事物正在发展，尚未达到止境。
宋·陈亮《戊申再上孝宗皇帝书》天下非有豪猾不可制之奸，虏人非有方兴未艾之势，而何必用此哉！”
The tech industry is flourishing and its growth is still in the ascendant.