First generation mnemonic device: The first generation of mnemonic device is relatively single in function, there are mnemonic trainers to enhance mnemonics and memory quality trainers to improve memory quality. Mnemonic trainers such as books, CDs, training courses, etc., mainly help students to improve the efficiency of memory and get good grades in exams by allowing them to master memory skills through association training and situational association. The mnemonic trainers on the market are pinhole chart code mnemonics. Memory quality trainer is invented and created by Professor Liu Dongguang, who proposed the concept of memory quality. It is to solve the root cause of poor memory, by improving the brain hardware – memory quality, so that students can really remember well and learn better. At present, the trainers that simply improve memory quality in the market are: memory hood, eye brain light wave memory eye, a-wave evoker, 3D image memory training system. Second generation memory device: The second generation memory device is a comprehensive product to improve memory quality and improve mnemonics, by upgrading your brain hardware and upgrade the brain software, divided into comprehensive memory class and composite class. This comprehensive memory class includes: desktop memory telecine, eye-brain sensitivity mirror, 3D eye-brain sensitivity mirror, where the desktop memory telecine is a memory device with three in one functions, which integrates anti-myopia, memory enhancement and eye protection functions with homework. Let students easily complete their homework at home at the same time to get anti-myopia, eye care care, enhanced memory, truly happy learning, easy to remember. This kind of composite class of products are 3D eye-brain sensitive mirror, eye-brain sensitive mirror, etc. Third, the third generation of memory: the third generation of memory is currently the most advanced, the most comprehensive memory, such memory according to the principle of memory, direct stimulation of the hippocampus, so that transient, short-term memory development into long-term memory, such products are currently the right brain image memory activator, hippocampal memory activator, where the hippocampal memory activator to implement memory positioning, to enhance the quality of memory has a great role. For more information: Professor Liu Dongguang Memory Network