3TD is the abbreviation of three-dimensional thinking, which means "three-dimensional thinking". It was originally put forward by the Bello Institute in the United States, with the purpose of cultivating people's ability to observe and analyze problems more comprehensively and comprehensively. Through 3TD training, people can have stronger thinking ability and understand and solve problems more deeply. In modern society, 3TD has become a very important capability, widely used in scientific research, engineering design, creative industries and other fields.

The cultivation of 3TD needs long-term practice and training. It includes three skills: spatial imagination, physical observation and mathematical thinking. Through these three aspects of training, people can gradually master the effective way of thinking and have a higher ability to analyze and solve problems. 3TD training is not only conducive to improving students' academic ability, but also helps them to better cope with various complex situations in the workplace and life.

Now, more and more educational institutions begin to pay attention to cultivating students' 3TD ability. In China, many schools have begun to introduce 3TD training programs. Through colorful training methods, students can master more effective thinking modes and solve various practical problems better. At the same time, in the workplace, some excellent enterprises have begun to attach importance to employees' 3TD ability, which is considered as a very important guarantee for a successful career development.