Talking about the practice of not lying.

The so-called lies come from the false heart. If the heart is true, it is only good for him, even if the language goes against the facts. This is not a lie. This is called ingenuity. Not for your own benefit, but to make others not suffer for it. Knowing how to use skillful art to benefit others is wisdom, compassion and bodhicitta. In order to educate the public and know that different beings have different habits and hobbies, Buddhas and Bodhisattvas often use different tricks to get rid of their troubles. This is great sorrow. For Buddhist precepts, the Hinayana precept is biased towards the conduct precept, while the Mahayana precept takes the precept first, followed by the conduct, and the precept is complete.

I hope my rough solution can help you solve your doubts.