suí biàn
去不去随便
qù bù qù suí biàn
Whether to go or not is up to you/as you wish.
什么时候来都行,随你的便。
Shénme shíhou lái dōu xíng, suí nǐ de biàn.
You can come anytime, it's up to you.
随便闲谈
suíbiàn xiántán
casual chat