Please assess the completion status of the following clinical trial:

Trial Title: Tong-Xie-Yao-Fang Granules for Diarrhea-predominant Irritable Bowel Syndrome

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: QUADRUPLE
- Phase: PHASE2/PHASE3
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* Being diagnosed as IBS according to the Rome III criteria;~* Diarrhea was present for at least 75% of the time;~* With a TCM differentiation as liver stagnation and spleen defficiency~* Had a colonoscopy within a year to rule out other bowel diseases.~Exclusion Criteria:~* Organic gastrointestinal disease, such as colorectal cancer, inflammatory bowel disease, advanced colonic polyp;~* Had gastrointestinal surgery within a year;~* Used durgs that affect gastrointestinal motility;~* Had psychological disorder;~* Serious disease in other system, which may bias the outcome measures.

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 75 Years
- Healthy Volunteers: f

Study Arms:
- Tong-Xie-Yao-Fang (Type: EXPERIMENTAL): Tong-Xie-Yao-Fang is a classic formula of traditional Chinese medicine for IBS-D. It is composed of 4 herbs: Radix Paeoniae Alba, Ledebouriella seseloides Wolff, pericarpium citri reticulatae and Rhizoma Atractylodis Macrocephalae. The granules will be administrated for thrice daily at a dose of 15g per time. The total duration of treatment is 4 weeks.
- Placebo (Type: PLACEBO_COMPARATOR): It is a placebo that made with similar appearance and taste as the Tong-Xie-Yao-Fang granules.

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