Xi'an Tianhou company was founded in 1992, focusing on equipment lubrication management and engine active maintenance field. With oil testing and oil purification as the main research direction, it has Xi'an Tianthick Filtration Technology Co., Ltd., Xi'an Tianthick Electronic Technology Co., Ltd., Shaanxi Province Industrial Oil Testing and Purification Engineering Innovation Research and Development Center, Xi'an Oil Testing and Purification Engineering Technology Center and Xi'an Industrial Oil Testing and Purification Engineering Laboratory. A total of 364 national patents have been obtained, and are the national intellectual property pilot units. Supported by the National Innovation Fund and included in the National Torch Program. Independently undertook the central investment in key industries revitalization and technological transformation special projects, Shaanxi Province major scientific and technological innovation special projects. Is the military diesel filtration product standards to develop the leading unit.