维也纳笑靥如花苏黎世碧海蓝天
[wéi yĕ nà xiào yè rú huā sū lí shì bì hăi lán tiān]
This romantic nickname combines two European cities and natural beauty, indicating smiling faces in Vienna and picturesque clear blue skies over Zurich. The imagery implies a joyous mood amid serene European landscapes.