追讨2420万元预付款及利息，德龙汇能子公司起诉广东广骏

Group 1 - The core issue involves DeLong Energy's subsidiary, Jingneng Natural Gas, filing a lawsuit against Guangdong Guangjun for the refund of prepaid LNG payments totaling 24.2 million yuan, after only receiving 800,000 yuan [1][2] - The lawsuit requests the court to order Guangdong Guangjun to return the principal amount of 24.2 million yuan, pay interest of 2.5545 million yuan calculated until September 28, 2025, and cover all related legal fees [2] - DeLong Energy's recent financial report for the first half of 2025 shows a total revenue of 890 million yuan, a year-on-year increase of 4.49%, while net profit attributable to shareholders decreased by 20.25% to 24.7074 million yuan [2]