The China Airlines pet policy is as follows:
Pets are not accepted in the aircraft cabin.
Except for guide dogs, hearing dogs and service dogs, pets must be placed in appropriate containers and transported in the cargo hold as checked baggage. Pets and pet containers will be charged by weight or by piece based on the excess baggage rates. Due to cargo hold temperature control considerations, China Airlines does not accept pets as checked baggage on the B738 and ERJ aircrafts.
Pets that may be transported include household cats, dogs or guide dogs. Some countries have special regulations and require pets to be shipped as cargo.
If you would like to transport your dog or cat as checked baggage, please contact China Airlines in advance. Pets and pet containers may not be included in the free baggage allowance.
Transporting pets as baggage is a service that is only available on flights directly operated by China Airlines and Mandarin Airlines.
Fighting dogs (including fighting dog mixed breeds and aggressive fighting dog sub-breeds) are not accepted for transportation.
Brachycephalic, snub-nosed or mixed breeds of snub-nosed dogs and cats will only be accepted for carriage when total journey time does not exceed 6 hours (total flying and ground time at intermediate point) and the temperature on any portion of their journey will not exceed 21°C (70°F).
Taking a pet to a foreign country involves preparation and planning far in advance of your departure date. Requirements for pet travel to a foreign country are set by the destination country. If you are you traveling to another country and bringing along your pet you’ll need to meet the animal health requirements of the country you are visiting.
More information on the China Airlines pet policy