1. Last year, Chinese managers at Collum Coal Mine shot and injured at least 13 miners during a wage protest, according to Ndandula Siamana, a Zambia police spokeswoman.

2. The incident, which occurred at the Chinese-owned Collum Coal Mine in 2010, caused widespread anger.

3. But the Collum mine incident has not been forgotten by Zambians who feel their government has had too cosy a relationship with Chinese investors.

4. Likewise, David Collum, 55, a chemistry professor at Cornell University, said he lost sleep over his investments in 1998 and sold half of his mutual funds.

5. In Zambia last October, the Chinese managers of Collum Mine shot and wounded 11 local coal miners protesting over pay and working conditions.

6. By rationally simplifying a mathematical model of batch rectification collum on citronella oil is presented.

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7. A year ago this month, coal miner Taska Chinko was in a crowd of Zambian workers gathered outside their Chinese managers' living quarters at Collum coal mine in Zambia.

8. By rationally simplifying a mathematical model of batch rectification collum on citronella oil is presented. With computer simulation better designing and operating schemes are obtained.

9. Bail for Xiao Li Shan and Wu Jiu Hua, the two former Collum managers, has been reinstated after the pair successfully appealed last week against a decision to revoke it.

10. The court ruling over bail comes as union officials say that management of Collum is in secret talks with families of the victims for an out-of-court settlement.

11. Hundreds of miles to the north, in Zambia's copper belt, the coal from the Collum mine helps fuel Chinese copper smelting.

12. In the past year, the four Chinese brothers who own Collum coal mine have made some changes.