Few people and then young couple crossing night city street, with alert sound

Few people and then young couple crossing night city street, with alert sound of traffic light signal. Yellow markings on the road, no cars in this direction, loudly ringing traffic alert sound. Young chinese couple walking across street lanes to the safety island in the middle of the street. Typical street in the middle of Mong Kok, Hong Kong city. Bright sign boards on the buildings at background, some night city life and people movement.