Cangjie vs Sucheng: rules and tradeoffs
Sucheng (速成, also called Quick or Simplified) is a stripped-down version of Cangjie that keeps only the first and last code of the full Cangjie code, dropping everything in between. A character whose Cangjie code is only one or two radicals stays the same in Sucheng. Sucheng is easier to start with, but the tradeoff is that many characters share one Sucheng code, so you often have to pick the character you want from a candidate list.
We recommend learning full Cangjie instead, because it makes you choose from candidates far less often, and a competent Cangjie typist is faster than a Sucheng one. Both methods use the same radicals and the same keyboard, so learning Cangjie means you already know Sucheng, and if you already type Sucheng you are most of the way to full Cangjie and just need to learn the code-selection rules. Below is how Sucheng takes its codes, then where the two methods agree and differ.
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Sucheng keeps only the first and last code
When a Cangjie code has three or more codes, Sucheng keeps only the first and the last, dropping the middle. The Code column below shows the full Cangjie code, and the notes give the resulting Sucheng code.
One and two-code characters are identical in both
A character with only one or two Cangjie codes has no middle to drop, so its Sucheng code is identical. These are mostly the most common basic characters.
Same Sucheng code, so you pick from candidates
Because Sucheng drops the middle radicals, different characters often land on the same Sucheng code, so you pick the one you want from a candidate list, and the more characters share a code the more selection it takes. In each group below the Cangjie codes differ but the Sucheng codes match.