Where to Find the Flesh Lily in Phantom Blade Zero

Finding a Flesh Lily for Yu'er is the first sidequest in Phantom Blade Zero, but it can't be completed until after beating Peng Meng and reaching the Sha-Chi tower area past the outpost. From the Valley Sha-Chi Tower 1st Floor bell, climb the stairs, circle the tower's right side, drop through the hole and slide down the ramp into the red spider lily cavern, then head up the slope to trigger a boss fight with Hua, Deadly Betrothed. After defeating her, take the Twinned Flesh Lillies from the corpse by the pavilion and return to the outpost to give the lily to Yu'er.