Smlie心照不宣Smlie妙不可言
[smlie xīn zhào bù xuān smlie miào bù kĕ yán]
Combines the word 'Smile' with phrases indicating mutual understanding ('without words') and unspeakable wonders respectively. Suggests sharing silent moments filled with inexplicable joy and harmony, using smiles as communication without uttering a word, enjoying the subtle beauty and depth within nonverbal connections.