His calligraphy hasn't reached the right level of mastery yet.
Tips
culture
火候 originated as a cooking term but became a metaphor for skill and timing in Chinese culture. Saying someone's 火候到了 means they've reached maturity in their craft.
usage
In cooking: 火候大了 (too much heat), 火候不够 (not enough heat). Figuratively: 火候到了 (the time is ripe / the skill is there).
