精干

Carries two intertwined ideas: 精 (jīng, 'fine/refined/skillful') and 干 (gàn, 'to do, capable'). Together: 'distilled to capability'. Used both for individuals (sharp, no-nonsense) and for organizations (small but high-performing). Compare 能干 (nénggàn, 'able, competent') - neutral capability vs. 精干's 'lean and sharp' connotation.

mistakes

干 here is gàn (4th tone, 'to do'), not gān (1st tone, 'dry'). Reading it 'jīnggān' would mean nothing.