The reasons why the cockatiel keeps singing:

1. The reason why the cockatiel keeps screaming may be because of insufficient drinking water and food, or because the environment is uncomfortable.

2. Xuanfeng may be courting a mate if it keeps calling. It may have seen the opposite sex it likes and wants to attract the other person's attention by calling.

3. The cockatiel kept screaming, probably because it was frightened. Some black phoenixes are very sensitive to sounds. Harsh sounds from the outside world will make them nervous, and they want to seek help by chirping.

Solutions to the problem that Xuanfeng keeps barking:

1. When the owner finds that Xuanfeng keeps barking, he should first feed and water Xuanfeng and check its health. Is the cage clean? If it is not clean, clean it as soon as possible.

2. If there are sharp and harsh sounds around, take the Xuanfeng away from this environment and try to raise it in a quiet environment.

3. Try to take out time to accompany the cockatiel. Don't let it feel lonely. You can talk to it more or play games with it.