他属我左手边的风景
[tā shŭ wŏ zuŏ shŏu biān de fēng jĭng]
It could be translated as 'He belongs to the view on my left'. This may suggest that the owner of this nickname has someone very dear and specific in their life, perhaps a lover or best friend, who is always beside them like the unchanging scenery outside their left shoulder.