Man with sword on back

【Genius Swordsman】【Passionate】【Decisive in killing】
His sister worked to death and his mother was seriously ill while his gambling uncle set his sights on his sister's ransom money. Lee had to kill the man with a knife.
Soon after, he met an old man named Sam. Eight years later, the young man became a swordsman. On his back it was not a scabbard, but a coffin for swords, the coffin for burying swords!
From then on, he with lofty ambitions stepped into the bloody world of cultivation!