China Airlines. Air China is better than China Southern Airlines, and the comparison is as follows:

1, Air China's flights cover a wide range, covering major cities and regions on all continents. Air China pays more attention to the quality of service and provides rich meals and entertainment facilities. Due to the high quality of service, the ticket price of Air China is relatively high, but there will be some preferential discounts on the specific time and route.

2. The service quality of China Southern Airlines is slightly average, and the dining and entertainment facilities are relatively simple.

To sum up, Air China is good.