An Two Vināya systems of Bodhisattva-śīla have beentypically used separately according to Mahāyāna tradition in China: the Brahmajāla bodhisattva śīla (梵網菩薩戒), and the Bhūmāvādhāre yogasthāne bodhisattva śīla (瑜伽菩薩戒). The former is originally preferred because, according to legend, 梁武帝 (Emperor Wu of Liang) (464-549) ordained the use of the Bodhisattva śīla. However, this Vināya text is not found in Sanskrit extant literature nor in Buddhist Sanskrit texts translated into Chinese, in enormous works by Nāgārjuna, Vasubhandu, Asaṅga and others…This absence remains an open question for those who study Mahāyāna Vināya in China.