In this observational follow-up study, patients with type III-IV head and face soft tissue deformities/defects following reconstructive surgeries will be asked to fill out 3 questionnaires, either through phone calls or video calls, in order to evaluate the post-operative outcomes such as morphological and functional recovery, quality of life and patients' return to the community.

The objective of this follow up study is to evaluate the effectiveness and to analyze the limitations of the existing management and treatment of severe burn injuries. Investigation of the factors affecting the recovery and patients' return to the community in patients with severe burn injury may lead to effective amendments of the existing management, and thus aiding in the development of an integrated diagnosis and treatment guidelines.

Inclusion Criteria:

1. Preoperative facial soft tissue deformities/defects of type III and IV
2. Major reconstructive surgery of the head and neck (flap transfer with revision at least once) performed before January 1, 2019.
3. Agreed and able to cooperate with the follow-ups, with signed informed consent form or audio recorded informed consent.

Exclusion Criteria:

1. Patients with mental illness, reduced cognitive capacity, unable to consent and unable to cooperate.
2. Minor patients without legal guardian.
3. Not willing to participate; informed consent form not signed.

This clinical study will include patients treated by Prof. Li Qingfeng 's professional team who have undergone major head and face reconstructive surgeries before January 1, 2019.

It is estimated that about 85 patients will be enrolled in this study.