Great Tang: I Carried a Coffin to Protest from the Start and Became a Chancellor for the Ages

Liu Hongye transmigrates to the Tang dynasty and becomes the son of Liu Ji, a high-ranking official in the Chancellery. Unfortunately, before Liu Hongye can enjoy a comfortable life, disaster strikes the Liu family. Liu Ji is sentenced to death, and the family falls into decline. Fortunately, Liu Hongye activates the Remonstration-to-Death System: if he dies while delivering a remonstrance, he can return to the modern world with endless wealth.

So Liu Hongye sets out on a path of courting death through remonstrance.

From the start, he makes his move as Li Shimin returns in triumph: he presents a coffin and risks his life to deliver a remonstrance!