zhì / zuò / wū / lóng / chá / shí / chá / yè / xū / yào / jīng / guò / bèi / jiān / cái / néng / sàn / fā / xiāng / qì制作乌龙茶时,茶叶需要经过焙煎才能散发香气。When making oolong tea, the leaves need to be roasted over low heat to release their aroma.