Red Avenue New Materials (09607.HK), a Chinese semiconductor photoresist supplier, began trading on the Hong Kong Stock Exchange on September 29, opening at HK$40.00 per share. The debut completed the company’s A+H dual listing. The exchange welcomed four new listings that day, including Red Avenue, Kinwong Electronic (03228.HK) and Robotech (03757.HK); all three AI supply chain technology stocks opened below their issue prices.