相思

to yearn / to pine

each other / one another / mutually / fret on the neck of a pipa 琵琶[pi2 pa5] (a fret on the soundboard is called a 品[pin3])

appearance / portrait / picture / government minister / (physics) phase / (literary) to appraise (esp. by scrutinizing physical features) / to read sb's fortune (by physiognomy, palmistry etc)

to think / to consider

lovesickness

one-sided lovesickness / unrequited longing

one-sided lovesickness; unrequited longing

(bird species of China) silver-eared mesia (Leiothrix argentauris)

Sauvignon blanc (grape type)

(bird species of China) red-billed leiothrix (Leiothrix lutea)

deep-seated lovesickness (idiom)

sick with love