Financial unified wage inquiry system. According to the inquiry of China Travel Service. Com, employees of Tongxin Coal Mine can inquire about the payment of wages in the financial unified wage inquiry system to see if the company has defaulted on wages. Tongxin Coal Mine Shanxi Co., Ltd. is located in the south of Yaozipo Village, Yungang District, Datong City, mainly engaged in mineral resources exploitation, coal washing and coal sales.