Tianjin Leading Import & Export Co., Ltd, yomwe idakhazikitsidwa kuyambira 1997. Professional kupanga ndi kutumiza kunja kwa utoto ndi zokhudzana ndi chemicals.Sound ndi dongosolo langwiro la kupanga, R&D, malonda, mayendedwe, ndiukadaulo support.Good mbiri m'maiko oposa 20.Kupanga kwapachaka kuchuluka kwa3000mt Metanil yellow, Acid lalanje II,ndiRN yofiira yofiira.M'modzi mwa otumiza kunja kwambiri aSulfur wakuda BR ndi Sulfur mitunduku china.