Hong Kong Zhi Lang Investment Co,. Ltd. is a large-scale private enterprise. It employs more than one thousand workers. In order to exploit and develop high technological products, we have imported many production machines from German, French, Italy, Japan. Now, we have turned out Negative Ion Air Purifier series for automotive use recently. It has many special efficacies, such as sterilizing, perishing smell in the car. It is a resistance-pollution product. It can make you feel that you are breathing fresh air from the nature.