build-index renders all 1,418 source characters and 34 target characters as 48x48 greyscale PNGs, one per font that natively contains the character. Fontconfig is queried per-character to avoid brute-force rendering across all 230 fonts (97% reduction: 8,881 targeted renders vs 326,140 brute-force).
Publication date: 10 March 2026
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FT Digital Edition: our digitised print edition，这一点在夫子中也有详细论述
Multi-platform scheduling