|The following is based on Fallout: Brotherhood of Steel and has not been confirmed by canon sources.|
If you find any spare computer parts, return them to the scientist in the garden for a reward.”— Quest description
Ching Tsun wants you to find spare computer parts for him. Parts can be looted from some robots in Vault Residence even before the quest is given. If you've missed them - head to Vault Facilities and loot some more.