Number + 轮 + Noun
轮 (lún) is a measure word used to count rounds, cycles, or phases of an event or process. It is commonly used with negotiations, competitions, and recurring activities.
经过三轮谈判,双方终于达成了协议。
jīng guò sān lún tán pàn, shuāng fāng zhōng yú dá chéng le xié yì.
After three rounds of negotiations, the two sides finally reached an agreement.
这是面试的第二轮,比上一轮难多了。
zhè shì miàn shì de dì èr lún, bǐ shàng yī lún nán duō le.
This is the second round of interviews, much harder than the first round.
新一轮降价活动下周就开始了。
xīn yī lún jiàng jià huó dòng xià zhōu jiù kāi shǐ le.
A new round of price reductions will start next week.