Jinan, the capital of eastern China’s Shandong Province, has started encouraging the adoption of the country’s central bank digital currency (CBDC) by introducing digital yuan payments across all its bus routes.
There are a lot of commuters by bus in China because of the Bus Rapid Transit (BTR) system which makes your movement by bus faster with lesser traffic, and also because public transportation is subsidized by the government to encourage more people in the country to use them. CBDC adoption in China will be really fast and thrive because of this method and style that has been use to introduce it and ensure usage.
See the estimated number from 2021,
The highest urban public transport ridership in China is by bus or trolley bus, at about 49 billion in 2021. This was followed by 27 billion taxi passengers and around 24 billion metro/subway riders.
https://www.statista.com/topics/5662/urban-public-transportation-in-china/#topicOverview