1. Mo Wen's return: It means don't ask me when I will be back, New Green Branch. This sentence expresses the poet's feeling that he is about to leave and is not sure when he will return.
Like the wind: it means like the wind. This sentence aims to describe that the poet's departure will be as fast as the wind.
The whole poem expresses the poet's strong feelings of parting and the uncertainty of reunion. The poet warned others not to ask him when he would come back, because his return date is uncertain and erratic like the wind. This poem conveys the pain and sadness of parting and the uncertainty of reunion through the description of parting and returning.