Extended table includes 183 stroks and components, it is the most difficult part of the course, but it is not too difficult to learn.
Characters in each cell has same numeric code. Carefully examine characters in each cell, you will find characters in same celly have similar features, such as similar shape or meaning, similar strokes or complexity.
All Chinese words are composed with these characters, and can be input by their numeric codes through numpad or PC main keyboard.
1. Many strokes and components are grouped together by breaking extention, for example:
11: 
21: 
31: 
41: 
42: 
44: 
2. Take a step by step approach to learn.
Learn 25 HeCharacters' SiblingSet1 first.
Then SiblingSet2.
Practice makes perfect, practice makes remembering easy, please do enough typing practice.
Very few foreign learners thought the extended table is difficult after practice.
Extended table explanation.