Fix handwritten word recognition and verified vocabulary

Update Chenguang learning platform

Complete on-device English notebook scanner

Refine Chenguang task-focused learning experience

Complete grade two and three learning flows

Make curriculum unit cards interactive

Improve sentence practice and speech matching

Add child-friendly quiz explanations and zhuyin

Improve English phonetics and answer feedback

Add family birthday login

Finish English learning flows and direct routes

Deploy static Chenguang site