Meaning of lián:
lián
联
Particle
(bound form) to ally oneself with; to unite; to combine; to join
Wǒmen xūyào yǔ qítā guójiā liánméng lái jiějué zhège wèntí.
我们需要与其他国家联盟来解决这个问题。
We need to ally with other countries to solve this problem.
Noun
(bound form) (poetry) antithetical couplet
Tāmen zhèngzài xiě yī gè duìzhàng de duìlián.
他们正在写一个对仗的对联。
They are composing an antithetical couplet.