Lei was born in June 1970 and ordained as a priest in 1995.[1] He became the diocesan administrator of Xichang after the death of Michael Xie Chaogang in 1999.[2] In 2010, he was elected as a bishop candidate.[1]
In 2011, Lei was recorded singing Chinese Communist Party songs on stage while wearing vestments. According to UCA News, Lei became "infamous among Catholics across China" for this sacrilegious act.[3] There were also rumors of sexual misconduct about Lei.[3][1]
In 2015, the Holy See appointed Lei as an apostolic administrator.[3] However, his status remained problematic and became a part of the 2016 Vatican-Beijing talks.[3]
Upon ordination, Lei said that he hoped to lead his diocese in "paying importance to evangelization".[1] On the next day, the feast day of Saint Francis Xavier, Lei celebrated his first mass as a bishop.[4]