Is “Emperor Zhezong was the crown prince of Emperor Shenzong and succeeded to the throne.” true?

The official history "History of Song" in the Annals of Emperor Huizong, Volume 4, records: "On the day Jiawu, an edict was issued to separately compile the 'History of Emperor Zhezong'." This confirms the existence of his reign. The novel "Water Margin" in Chapter 002 records: "Emperor Shenzong reigned for eighteen years and passed the throne to Crown Prince Zhezong." The succession relationship in both is consistent.