Abstract（頁1，14）；1. Debating on the ECE voucher in Hong Kong（頁2-3）；2. Defining 15-year free education with empirical evidence（頁4-6）；3. Understanding the dilemmas with the "3A1S" framework（頁7-8）；4. Searching for the practical solutions（頁9-12）；References（頁12-13）
