As of Friday, 600-900 unionized pilots who work for China Airlines have refused to work. The pilots decided to strike because their negotiators were unable to come to an agreement with the firm’s management regarding pay and an inadequate number of staff. Pilots striking has resulted in the cancellation of 80 flights, which has impacted approximately 20,000 passengers and cost the company $34 million. Strikes in Taiwan are rare, because firms typically discourage unionization. However, pilots have a lot of bargaining power because there are so few of them; the pilots continue to make demands as they realize the impact that their refusal to work has on the company.
See "Taiwan's China Airlines pilot strike grounds thousands of passengers during busy New Year holiday", Ralph Jennings, The Los Angeles Times, February 13, 2019