### Chinese: 据卫生官员介绍，豪登省在12月的第一周发现的新病例增加了400 % ， 测试显示，奥密克戎变体的病例占90%以上。
### English: According to health officials, the number of new cases detected in Gauteng in the first week of December increased by 400 percent, and tests showed that the Omiljung variant accounted for more than 90 percent of cases.
### Errors: There is a major error at "Gauteng". There is a major error at "the Omiljung variant".

### Improved English: According to introduction from health officials, the new cases detected in Gauteng province in the first week of December increased by 400%; according to test results, Omicron variant cases accounted for more than 90%.