Shenzhen Tongda Commercial Firm is an export agency specializing in the business correspondence and documents to write and translate in English, Japanese and German; and specializing in injection moldings,die stampings and die castings for zinc, magnesium, aluminum alloys utilized in the family hardware, electronic and electrical equipments, Auto industries; as well as specializing in natural crystalline medium/high-carbon flaky (scaled crystal) graphite utilized in battery, crucibles, castings, pencils, carbon products ,national defence, hi-technological and war industries.