From Hangzhou Metro Line 3 to the Olympic Sports Center, you can follow the following steps:

1. Take Hangzhou Metro Line 3 and arrive at Wulin Square Station after 6 stops.

2. Get off at Wulin Square Station and transfer to subway 1 line to reach Civic Center Station.

3. Get off at the Civic Center Station and walk about 300 meters to the Olympic Sports Center.

These are the specific steps from Hangzhou Metro Line 3 to the Olympic Sports Center for your reference. For more information, please consult the electronic map or the local traffic staff.