| 1. Changchun
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| Travel information about Changchun by Travel China Guide. |
| http://www.travelchinaguide.com/cityguides/jilin/changchun/ |
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| 5. Hongda Opto-Electron Co., Ltd.
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| High-tech enterprise in information technology and bio-technology. Products include fingerprint identity recognition systems. |
| http://www.cohongda.com |
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