How can upa-pāduka from lotus flower in front of all Buddhas

Master Ouyi Zhixu

Because the Bodhisattva has accomplished eight kinds of dharma, he upa-pāduka from lotus flower in front of the Buddhas:

One, even to the point of losing his life, won't talk about other people's faults

The second is to persuade sentient beings to take refuge in the Three Jewels;

Third, place everything in bodhicitta;

Fourth, practice Brahmacharya without Kleshas(defilement);

Fifth, build a Buddha statue and place a lotus seat;

Sixth, for sentient beings who are worried, help them eliminate their worries;

Seventh, always humble himself among arrogant people;

Eighth, do not get angry with others.

Brahmacharya

https://en.wikipedia.org/wiki/Brahmacharya

如何能於諸佛前蓮花化生

https://www.fodizi.tw/qt/qita/25327.html