In 2020, Anyang Railway Equipment Co., Ltd. provided Nanlong Railway with a combination of 50kg/m rail joint splint and M24*145 rail bolts (intensity grade 8.8) with ut, φ24 single coil spring washers and 50kg/m ordinary insulation rail joints (each set of insulation rail joint combination includes 2 insulation joint bars, 6 sets of rail bolts with nuts, 6 pcs of single-coil spring washer, 12 pcs of flat washers, etc).