强中自有强中手

強中自有強中手
qiángzhōngzìyǒuqiángzhōngshǒu
(idiom) however strong you are, there is always someone stronger

CEDICT

one should never be complacent because there is always room to improve one's craft

Wiktionary

（谚语）比喻智慧或技能永无止境，高手中有更高明者。《三国演义．第十七回》：「强中自有强中手，用诈还逢识诈人。」明．沉璟《义侠记．第二十二齣》：「强中自有强中手。你还不见机走，让了快活林，残生尚能救。」也作「强中更有强中手」。

重編國語辭典

Entry Composition

=1 强 qiáng
  1. strong
  2. powerful
  3. better
  4. slightly more than
  5. vigorous
  6. violent
  7. best in their category, e.g. see 百强 bǎiqiáng
=1 强 qiáng variant of 强 qiáng
2 中 zhōng
  1. within; among; in
  2. middle; center
  3. while (doing sth); during
  4. (dialect) OK; all right
3 自有 zìyǒu
  1. (I, they etc) of course have (a plan, a way etc)
  2. one's own (apartment, brand etc)
=4 强 qiáng
  1. strong
  2. powerful
  3. better
  4. slightly more than
  5. vigorous
  6. violent
  7. best in their category, e.g. see 百强 bǎiqiáng
=4 强 qiáng variant of 强 qiáng
5 中 zhōng
  1. within; among; in
  2. middle; center
  3. while (doing sth); during
  4. (dialect) OK; all right
6 手 shǒu
  1. hand
  2. (formal) to hold
  3. person engaged in certain types of work
  4. person skilled in certain types of work
  5. personal(ly)
  6. convenient
  7. classifier for skill

classifiers: 雙, 隻