For a long time, schools in my country have used traditional mixed wood for their desks and chairs. Starting in the 1980s, coastal areas in eastern China began to learn from foreign experience and started using steel-wood composite desks and chairs, replacing wooden ones. While steel-wood desks and chairs have undergone more than 20 years of development and are now produced mechanically, they still suffer from drawbacks such as loose nails, rust, and short lifespan, and cannot completely replace the first generation of desks and chairs.
In rural schools in most parts of central and western China, students still mostly use the first generation of desks and chairs made of mixed wood. Years of use have proven that the quality of steel-wood student desks and chairs is not significantly better than the first generation of wooden desks and chairs, which are widely recognized in the education sector. Therefore, although development has continued for more than 20 years, the pace of development has been very slow, and it can only serve as a transitional product to replace the first generation of desks and chairs.
With rapid technological advancements, the materials used for doors and windows in high-rise buildings in developed countries have gone through three stages: wood, iron, and aluminum alloy. More than a decade ago, they began to fully replace aluminum alloys with hard plastics. Technicians have designed a large number of plastic-steel parts to replace wood, iron, and aluminum parts in automobiles, trains, ships, and airplanes, with performance far superior to the former. Replacing wood, steel, copper, and aluminum with plastic is an inevitable trend of technological advancement and a necessary path for the future development of my country's manufacturing industry; school desks and chairs are no exception. Moreover, future school desks and chairs will not only be height-adjustable, but there will also be a type of integrated desk and chair system, consisting of height-adjustable desks, chairs, and adjustable partitions. This solves the problem of existing primary and secondary school desks and chairs not being able to adjust desk height, chair height, or desk-chair spacing, making them suitable for students of all ages and body types. It can be adjusted to perfectly meet the hygiene standards of each student's desk and chair.