Source - A full translation of the letter, as provided to Wallace, reads:“Inmates in the Yingshan Prison in Guangxi, China are working 14 hours daily with no break/rest at noon, continue working overtime until 12 midnight, and whoever doesn't finish his work will be beaten. Their meals are without oil and salt. Every month, the boss pays the inmate 2000 yuan, any additional dishes will be finished by the police. If the inmates are sick and need medicine, the cost will be deducted from the salary. Prison in China is unlike prison in America, horse cow goat pig dog (literally, means inhumane treatment)."
Similar notes reportedly have turned up in items sold at stores such as Saks Fifth Avenue and K-Mart in the past.