February 2 (Reuters) - The mainstream quotation range for xylene in the South China market is 5,900-6,000 yuan/ton, up 50 yuan/ton from the previous trading day. Sinopec South China's listed prices for xylene: Guangzhou Petrochemical's isomer grade is priced at 6,000 yuan/ton, Maoming Petrochemical's isomer grade is priced at 6,000 yuan/ton, and Sinochem Refining's isomer grade is priced at 6,000 yuan/ton. Domestic toluene and xylene prices have weakened slightly and may continue to fluctuate and decline within the day. Coupled with the deepening decline in crude oil, market sentiment is bearish. Although current inventory levels are low, increased supply from refinery destocking before the Spring Festival will put pressure on short-term prices, leading to a trend of fluctuating weakness.