Twenty participants in three times a week group will receive acupuncture treatment 3 times per week (every other day) for 4 weeks, 12 sessions totally. The acupuncture operation as above. Participants will not be not allowed to take any other medication or accept any treatment for FD. should not be accepted during the study. In case of unbearable symptoms, the assistant researchers will detailly document.

Twenty participants in once a week group will receive acupuncture treatment 1 time per week for 4 weeks (Weekly fixed day), 4 sessions totally. Other inventions will be same as the Three times a week group.

After the health education（such as dietary adjustment for FD patients）, the participants will be followed up for 4 weeks. At the end of the follow-up, the patients could be given free acupuncture treatment (the invention will be similar with that of the Three times a week group) for 4 weeks at will.

The acupuncture treatment strategies in this study are based on traditional Chinese medicine theory and opinions from the acupuncture experts. The acupoints are bilateral Zhongwan（CV12）, Tianshu（ST25）, Neiguan（PC6）, Liangqiu（ST34）, Yanglinquan（GB34）, Zusanli（ST36）and Taichong（LR3）.All the acupoints will be localized according to the Nomenclature and Location of Acupuncture Points of the People's Republic of China. During the acupuncture treatment, the participants will be in supine position. After 75% alcohol pads sterilizing the skin around the acupoints routinely, the acupuncturists will use sterile disposable steel needles (0.3 mm×40 mm; Huatuo Brand, Suzhou Medical Appliance, China) to insert into the acupoints above. The acupoints will be inserted vertically at 13-40 mm with the manipulation of steady small lifting, thrusting, and twirling 3 times to induce a sensation of de qi (sourness, numbness, and heaviness).

The primary outcome is the score change in Nepean Dyspepsia Life Quality Index （NDLQI）compared with baseline at week 4. The NDLQI is a scale of 25 items about the quality of the patients' life with a ranging score of 1-4 of each item. The higher scores indicates a worse outcome.

The score change in NDLQI compared with baseline at weeks 2, 8 and 12. The NDLQI is a scale of 25 items about the quality of the patients' life with a ranging score of 1-4 of each item. The higher scores indicates a worse outcome.