Xiaohui (Richard) Han

+1. Ex: how do I USE subkeys (not just generate sub-keys)

Example private key: ``` -----BEGIN PGP PRIVATE KEY BLOCK----- Version: Keybase OpenPGP v2.0.10 Comment: https://keybase.io/crypto xcLYBFVZbLwBCAC9uWsXHOkqH/gAdySj/28yRfchBqzbj1X2AgDgnFmos1SPmYT8 UYhIb2oW9S3bXsJy+FKWqdXtJQmd+l+Ro+P58Aav9tUpNUPyt2yy7xt6f1thfdmt fCOrhHeI8LdPXk0eZudzTW4uVQzg6MLNpGeHgiHrLdLf1UhB8UeSupZQuYw9PgBv VMzwc5H2/99/DvbFE4ry+lhEc+VZKLYUIw4QgL+KkMqhRYfQIFFhlXJS8ou/951N XkKrvj/SPTSskFbACmsTYol9DWYiYpAVurPiYe/Ch5VllErVDG6bT/125CIDvTbQ vN5fYYZRdPvVVxOPV6Nl8T/xy/kz5Knyqrm1ABEBAAEAB/0Y0XGF031YylfJz8wW O+rS274pLtNb4VMwXDC7MRi1bcgJBN8VlqDKQPDS0f3OrYWoPn2nQc4/OFIavU7V IWhIILLvP83AlzwtOvtYKNkiXBibFzhrbkrIPAra+gowsrhJ2tI6Dg30t6F4plod Rn1Yh5hiSFtGdoL+RU7Eje3t3y23dAWvF+zHvp6QxJ0AexcCmRDshfqskrMgclB9 oB3gvowCvQ444LpdF/0ANv9QuQxxvMH5FR/AKKol8JM41ycSUlshTgRxkJ6qyCuQ xDGVYoysdPOyEkmvRAHjyoEMICxOqmSnXrFS/djht3/13Rb9f6/EbvMc8r0Cvui4 jLHhBAD5ABoM/i3zv/CbmvyE7GMNttPb6UJnBl+tLhPimr5K0/IvqPh5d17vpD/j HWybE+DT+1agIyG0DVtIcUGv+0rQFgieGogNEFqebnAHO8V4ct2uuZ5MjfCxrhFE ivC1UoDQfgBRhqDqmVI9W0jiea+drJv3dlbKdzbabJ8+pf/jSQQAww6+ctszVYqX QjmjNSdv7zdlLH9BTEXU7DJxovOY6kTvaMEp6+BiTVg1xWzM+NGWU49wpv2IDRot...