The Boundary Between Immortals and Mortals: My Phone Came to Life

Fantasy imagination + System + cultivation + high martial arts + keeping a low profile + scheming + ruthless decisiveness...

Zhang Ping unexpectedly transmigrates to ancient times and starts out as an ordinary man: he gets married, settles down, suffers oppression, and has creditors come knocking...

He activates a phone System that connects the Three Realms: modern goods, ancient gold, silver, and antiques, resources from the immortal realm...

Developing the village, getting oppressed, a chance encounter after being badly wounded, an adventure in the wilderness... He plays the pig to eat the tiger, cuts down his enemies, kills tyrants, beats bandits, crushes cultivators, trounces his opponents, fights against the myriad races, draws beauties from both the immortal and mortal realms into his arms, and runs wild across both worlds!

Harem, multiple female leads. This blurb can't do it justice, so please read the novel...