PetroChina's (0857.HK) Dalian refinery, one of China's regular gasoline exporters, plans to shut down a 1.4 million tonne-per-year fluid catalytic cracker for about one-month of regular repairs from late April, a company source said on Wednesday.

"The repairs will last about 25 to 30 days...it will have some impact on gasoline production," said the official familiar with the northeast China-based 410,000 barrel-per-day plant, one of the country's largest refineries.