What did Guanyin Bodhisattva do before becoming a Buddha?

Guanyin used to be a Buddha, but now she is a waiting Buddha. After the Buddhist movement of Amitabha, it will replace Amitabha, and Guanyin Bodhisattva is also the future Buddha. Bodhisattva has great compassion, and is dedicated to sound relief. Save the suffering beings. What is the bodhisattva of all beings? In the past, now and in the future, I have been cultivating bodhisattvas and all beings.