Give me an introduction over 200 words for Shijiazhuang Sincere Chemicals Co.,Ltd, a chemical company in RM.1705 UNIT 3 BUILDING 2 JINLING MANSIONS NO.106-1 EAST YUHUA ROAD Hebei,China Write exactly 10 paragraphs each separated with two new lines answering this question. The 4th paragraph must start with "service".
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