1. The patient immediately received acupuncture treatment and imaging scan on the scanning bed (acupuncture and imaging scan at the same time). Acupuncture left Hegu point to promote qi. Axial T2WI imaging for 48 seconds, fMR-BOLD imaging for 8 minutes and 11 seconds, and ASL imaging for 6 minutes and 03 seconds were simultaneously collected during acupuncture. The scanning time of each sequence was divided into 4 time periods, each time period was 1 time, each scanning sequence was 4 times, each time was 10 seconds, and the duration of acupuncture was 15 minutes and 02 seconds.
2. After acupuncture withdrawal, axial T2WI imaging was repeated for 48 seconds, fMRI-Bold imaging for 8 minutes and 11 seconds, and ASL imaging for 6 minutes and 03 seconds.

Control group (false acupuncture group)

1. Axial imaging of DWI was performed before the patient underwent pseudoacupuncture (12 minutes 08 seconds).
2. The patient immediately underwent a sham acupuncture and imaging scan on the scanning bed (the sham acupuncture and imaging scan were performed simultaneously). Pseudoacupuncture left Hegu point. DWI axial imaging (12 minutes 08 seconds) was collected synchronously during the fake acupuncture. The scanning time during the fake acupuncture was divided into 4 time periods, with 1 needle in each time period, 4 needles in each time period, each time for 10 seconds, and the duration of the fake acupuncture was 12 minutes 08 seconds.
3. Axial DWI imaging was repeated (12 minutes and 08 seconds) after acupuncture withdrawal.

Real Acupuncture Group Main acupoints: Hegu (bilateral), Taichong (bilateral), Taiyang (unilateral), shuogu (unilateral), Fengchi (unilateral); Positioning: refer to the 2006 national standard of the people's Republic of China (gb/t 12346-2006) acupoint names and positioning Operation method: supine position, skin routine disinfection. The special model of acupuncture and moxibustion (0.30mm × 30mm), fix the gasket on the acupoint skin with seam free tape, and then acupuncture. After acupuncture, each acupoint will be lifted, inserted and twisted three times in small amplitude; The needle will be kept for 30 minutes. During this period, the technique of small amplitude uniform lifting, inserting and twisting (3 times) will be performed every 10 minutes. A total of four times of needling will be performed.