Tā gùyì biǎoxiàn de hěn lěngdàn, xiǎng jiècǐ guānchá tā de fǎnyìng.
He deliberately acted cold, hoping to see from it how she would react.
Tips
usage
Formal. Speeches use 借此机会, "taking this opportunity"; in writing 借此 + verb means "by this means", as when a poet uses a scene to mock the court. 藉此 is the same word written with the older character, still common in Taiwan.