For long English cucumber, wash the cucumber and peel off tough skins. For small cucumber, remove the two ends.
Smash with a wide kitchen knife (like Chinese slicing knife) until the cucumber is well crushed. Then cut into one bite pieces.
Transfer all cucumber cubes into a bowl. Mix well with mashed garlic, salt and sugar.
Or further add light soy sauce and vinegar to make a more strong version.
Or add chili oil for a hot version.
For very tender and young cucumber, you can keep most of the skins.