Please assess the completion status of the following clinical trial:

Trial Title: Respiratory Regulation With Biofeedback in COPD

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: OTHER
- Time Perspective: None
- Masking: NONE
- Phase: None
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* 1. Diagnosed COPD, pulmonary spirometry test FEV1/FVC\<70% and FEV1\<80%.~* 2. At least 20 years old and has communicative capacity.~* 3. Can walk by self or assistive device prior hospitalization.~Exclusion Criteria:~* 1. acute exacerbation attack or recurrent acute exacerbation and SpO2\< 90%.~* 2. Can perform respiratory regulation correctly within exercising regularly.~* 3. Know cancer.~* 4. Comorbidity with sever pulmonary and cardiac disease.~* 5. Diseases of musculoskeletal system.~* 6. Psychotic or cognitive disorder that likely not be available to complete study procedures.~* 7. the hearing-impaired or visually disabled.

- Gender: ALL
- Minimum Age: 20 Years
- Maximum Age: 90 Years
- Healthy Volunteers: f

Study Arms:
- experimental (Type: EXPERIMENTAL): The experiment arm will get educational leaflets to pursed-lip with diaphragmatic breathing training and oximetry level evaluation.
- controlled (Type: NO_INTERVENTION): None

Based on this trial design, predict the completion outcome and termination type (if applicable).