The trials were stopped after recruiting 60% of the planned sample after a median of 3 months follow-up and one interim analysis. The immersive virtual reality based training has proven to work.

The investigators will conduct a single-blind, randomized controlled trial of 60 patients with subacute stroke. Patients will be randomly assigned into a control group and an intervention group. The intervention group will participate in immersion VR training for 3 weeks. The control group will receive for traditional rehabilitation training for 3 weeks. Then, the patients will be reevaluated to determine changes in upper extremity function, cognitive function, cortical and subcortical activation patterns, and performance of activities of daily living after the baseline assessment.

Inclusion Criteria:

1. having had an ischemic stroke in the first time
2. age 30 to 80 years old
3. first stroke within 2 month
4. GCS score >8
5. the upper-limb function BrunnstromⅡ、Ⅲ

Exclusion Criteria:

1. hemorrhage or transient ischemic attack(TIA)
2. important organs such as heart, lung, liver, kidney function decline or failure
3. previous history of brain neurosurgery or epilepsy
4. had severe cognitive impairments or aphasia, which made the participants unable to understand the instructions given by the investigators
5. with claustrophobia and body with metal (such as metal teeth, etc.) are not suitable for to MRI scanning