jí:* 急。也作"革"。 qì:* 皮革坚硬
(interchangeable 革) urgent; anxious, hard, solid and durable leather, a leather whip
Standardized 221–206 BCE (Qin); developed earlier in Qin
The standardized seal script promulgated after Qin’s unification, based on earlier Qin seal forms and used as an empire-wide norm.Wikipedia ->