My Seven Invincible Senior Sisters

I have seven invincible senior sisters. The eldest sister is a leader in the business world and is as rich as anyone in the country. The second senior sister is a legend in the military and has made great achievements. The third senior sister is unparalleled in medical skills. She is alive and dead with human flesh and white bones. The fourth senior sister is mysterious and unknown. The fifth senior sister is famous in the world and has a scheming mind. The sixth senior sister is a leader in Chinese studies and is extremely talented. The seventh senior sister is an underground king and decisive in killing. And I am their favorite junior.