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This picture taken November 14, 2021 shows a "Keep Quiet" sign inside a bus operated by a Hong Kong travel agency offering five-hour "quiet bus" tour marketed as a "route to nowhere" for travel-craving and restless residents to snooze on board in Hong Kong. - The novel new business in Hong Kong is putting on lengthy 85-kilometre (52 mile) bus journeys as a possible cure for insomnia. (Photo by Bertha WANG / AFP) (Photo by BERTHA WANG/AFP via Getty Images)

This picture taken November 14, 2021 shows a "Keep Quiet" sign inside a bus operated by a Hong Kong travel agency offering five-hour "quiet bus" tour marketed as a "route to nowhere" for travel-craving and restless residents to snooze on board in Hong Kong. - The novel new business in Hong Kong is putting on lengthy 85-kilometre (52 mile) bus journeys as a possible cure for insomnia. (Photo by Bertha WANG / AFP) (Photo by BERTHA WANG/AFP via Getty Images)