Shi Yan opened his eyes, staring at the medicine slaves at a distance.
Those slaves mostly came from poor families. In order to survive, they had no choice but to sign the contract with Mo Yanyu, selling themselves as slaves. If they were lucky enough to survive the first six months, not only could they regain their freedom, but they would also get paid 200 Purple Crystal Coins[1]. If they were unlucky and died from medicinal trials, their family would receive the money instead.
In the Grace Mainland, one Black Crystal Coin was equal to 100 Purple Crystal Coins, which equaled 10 thousand Blue Crystal Coins. The annual income of an average citizen was merely 5-6 Purple Crystal Coins. 200 Purple Crystal Coins were almost the savings for 40 years of work in another job.