Reading Confucian Ethics on the Façade: A Semiotic-Coding Framework for Guangfu Ancestral Halls Demonstrated on the Chen Clan Ancestral Hall

Confucian ethics are widely credited with shaping Guangfu ancestral halls, yet existing scholarship approaches their façades from two disconnected ends: macro-cultural studies treat the façade as an undifferentiated emblem of lineage order, while craft studies document individual motifs without asking how the composition addresses a viewer. This study bridges the two with a transparent, auditable, and replicable semiotic-coding framework, demonstrated on the main ceremonial façade of the Chen Clan Ancestral Hall in Guangzhou [广州] (1894). A semiotic reading identifies three legibility bands: a doorway band at eye level that regulates entry, a mid-register readable from the forecourt, and a crown that frames the long view. MAXQDA-assisted coding then classifies 88 carrier items screened by explicit inclusion rules. Confucian themes dominate (59.1%) over Taoist-related (22.7%), local Guangzhou (13.6%), and foreign (4.5%) repertoires; textual carriers are confined to the doorway band, narratives concentrate in the mid-register, emblems dominate the crown, and cross-validation shows each reading band is met by its coded distribution. Theoretically, the analysis reveals the façade as a graduated moral curriculum that reserves threshold and skyline for Confucian claims while domesticating other repertoires into subordinate positions; methodologically, the framework gives every value claim a traceable carrier, rule, and audit trail; practically, it equips heritage interpretation, conservation prioritisation, and cross-site comparison of Guangfu ancestral hall façades.