共赏旧时燕
[gòng shăng jiù shí yàn]
It describes the pleasure derived from admiring swallows together just as what people have done in the past. Swallows carry a significant meaning in Chinese culture. They are considered symbols of hope, spring, happiness and loyalty. This kind of idyllic scene often occurs when couples recall their previous happy times, and it's also an imagery of tranquility and harmony.