抬头看见你的微笑低头听见你的心跳
[tái tóu kàn jiàn nĭ de wēi xiào dī tóu tīng jiàn nĭ de xīn tiào]
'Looking up, I see your smile; looking down, I hear your heartbeat,' expressing the depth of emotion or closeness felt towards another person during tender moments of proximity and connection.