中文大學自學中心普樂網
https://www.ilc.cuhk.edu.hk/Chinese/plw/intro/ch1/ch1.html
中英對照香港學校中文學習基礎字詞 Online tools of Simple Characters and Vocabularies
中英對照香港學校中文學習基礎字詞
Lexical Items with English Explanations for fundamental Chinese learning in Hong Kong schools