Needle on bilateral BL33 acupoint 50-60mm with a 60°angle. A feeling of soreness and distension will be felt when needling into the 3rd posterior sacral foramina(S3). Needle with 75mm long needle. An electric stimulator is put on. SDZ-V electric stimulator (produced by Suzhou Medical Instrument Co.Ltd). continuous wave(CW), 10Hz. Stop turning up the current intensity when patients could not stand. 3 times a week. Once every other day. The treatment period lasts eight weeks. totally 24 times.30min/time.

with the patient in the prone position. The acupoint routine disinfection of skin, and then the fixed pad is adhered on the acupoint. The 1.5 inches blunt tip needle pierce through the fixed pad, then it reaches the surface of the skin, uniform lifting thrusting and twirling all 3 times but do not pierce the skin. Then connect the electric acupuncture apparatus with special power supply wire electrode (special power line as the middle wire cut, looks as normal; that electroacupuncture instrument display connected to the state, but the actual without electricity), in the bilateral Zhongliao points, Hui Yang points on the needle handle; the period of treatment and the other manipulation of the placebo group are same as the deep needling acupoint group.

Solifenacin Succinate Tablets (made by the Anse Tailai Pharmaceutical (China) R & D limited company) 5mg, 1 tablets each time, 1 times / day, oral administration of 30min before meal, even for 8 weeks.

For the deep needling acupoint group, needle on bilateral BL33 50-60mm with a 60°angle. A feeling of soreness and distension will be felt when needling into the 3rd posterior sacral foramina(S3). Needle with 75mm long needle. An electric stimulator is put on. SDZ-V Hua Tuo Brand electric stimulator (produced by Suzhou Medical Instrument Co.Ltd). continuous wave(CW), 10Hz. Stop turning up the current intensity when patients could not stand. 3 times a week. Once every other day The treatment period lasts eight weeks. totally 24 times.30min/time.

Mean daily micturition frequency = Sum of 3-day micturition frequency in a week/3 . The investigator gets the frequency of mictuitions by micturition diary.Mean daily micturition frequency will be calculated based on the micturition diary at week 0(baseline), 2, 4, 6, 8, 20, 32.

GRA（Global response assessments）will be used to grade:

The overall response will be assessed by patient self-rating scale. There are seven levels which will be graded by patients based on their situation: significant deterioration, moderate deterioration, mild deterioration, no change, mild improvement, moderate improvement, significant improvement in symptoms (compared with their condition before treatment). The moderate and significant improvement will be defined as effective treatment while others will be defined as ineffective ones according to the patients' options. The response rate will be calculated separately.

Response rate= Effective number of patients in each group/ Total number of patients in each group×100%

For therapeutic benefit scores, treatment will be regarded beneficial if scores are above (3). The patient-Rated global assessment of treatment benefit will be calculated according to scores of patients in each group.

For treatment satisfaction scores, scores above (3) will be recorded as satisfaction. Treatment satisfaction scores will be calculated based on scores of patients in each group.

The willing to continue the treatment scores, scores above (3) will be recorded as willing to continue the treatment scores, the scores will be calculated based on the scores of patients in each group.