When traveling with others he often takes out charcoals or a fountain pen and sketches down what he sees as practice in training his powers of observation and quickness.
和別人同遊的時候，為了搶時間，往往用隨身的鋼筆、炭筆，「看到什麼就速寫下來」，算是做「功課」，訓練自己的眼力和敏銳度。