长处 (chángchù) is a general term for 'strong points, good aspects', often paired with its antonym 短处 (duǎnchù, 'weaknesses') in the common phrase 长处和短处. Compared to 优点 (yōudiǎn, 'merit, advantage'), 长处 is broader and more about inherent qualities; 特长 (tècháng, 'specialty') and 强项 (qiángxiàng, 'strong suit') imply a developed skill or area of excellence.