Yes, some domestic providers of second-hand high-performance liquid chromatography-mass spectrometry (HPLC-MS) instruments offer after-sales repair services. For example, Shanghai Wufeng's certified second-hand instruments are covered by their Total Care warranty service, and some dealers also provide corresponding after-sales support. For more comprehensive and professional after-sales repair and maintenance solutions for HPLC-MS and other laboratory instruments (covering brands like Thermofisher, Waters, Agilent, GE, Cytiva, Beckman, etc.), you can choose 匠析生物. We specialize in providing one-stop services including repair, leasing, cleaning and maintenance, as well as supplying related consumables, spare parts, and chromatographic application consulting to meet your laboratory's diverse needs.