精诚

精 = 米 + 青 : Joan of Arc scoops a bit of water from the fountain of youth in front of the engine and pours it into a bowl of rice. The water refines the rice into rice wine, and as Joan of Arc drinks it, she finds her spirit renewed.

诚 = 成 + 讠 : Charlie Chaplin (ch) wants to visit engine, but he's held up at the entrance ((e)ng2). If he wants to enter he has to pass a lie detector test first. He readily takes the test and answers all questions very honestly (诚), and the progress bar mounted on top of an advertising column (讠) shows steady progress. At the very end however the progress bar is stuck at 99% (成) and won't progress regardless of how honest (诚) Charlie answers his questions.