chèn zhe / cù xiāo / huó dòng / tā / dǎ suàn / bǎ / yòng le / duō nián / de / kōng tiáo / huàn xīn

趁着促销活动，他打算把用了多年的空调换新。

Taking advantage of the promotion, he plans to replace the air conditioner he has used for many years.