23 years of air purification and humidification machine design
The output of market research, product definition, patent circumvention, etc. has been omitted.

The first version of the program does not have a strong sense of upgrade and iteration, as the high-end market positioning of the value is also very weak.
The sense of hierarchy and strength of the subject is also insufficient.

The second edition is much better, enhancing the sense of strength.
The sense of value is also a little higher.
The key and display are also done together, and the operability is more reasonable.
(But how now it looks a bit like a trash can...)