- Washing hands is common, but not necessarily any more of a practice than in Western countries. But in many places like in subway station bathrooms they do not have soap.
Some of the cultural things like mask wearing (which was born out of the density and close proximity in public transit) are shared between Hong Kong, Taiwan, and other Asian countries, but a lot of things are also different culturally so I don’t think you can easily attribute these reasons as “not surprising” with regards to coronavirus growth.