Listen to a short, loud clip of Shanghai pop blaring from a trinket shop along Nanjing Road near the Bund.
If the red didn't get your attention, the music was certain to.
In a trinket shop just off the Bund, Chinese pop blared from a speaker. In spite of the crush of shoppers, you were hardly aware of other people due to the noise.
The clerks were amazing in negotiating prices over (under?) the din.