Complex sentence: The draft law had been subject to a constitutional challenge with some legal scholars, notably Gong Xiantan of Beijing University, arguing that it violated the PRC Constitution's characterization of the PRC as a socialist state.
Split into simpler sentences: The draft law had been subject to a constitutional challenge. Legal scholars, notably Gong Xiantan of Beijing University, argued that it violated the PRC's Constitution's characterization of the PRC as a socialist state.