The industrial application product of China Telecom's "Tax Pass Tianyi Tax Pass" is an online invoice and unified working platform based on the tax private network. By taking advantage of the integration of China Telecom's mobile network, telephone network and Internet, it can realize comprehensive tax-related applications such as broadband, 3G and multi-channel online issuance of tax invoices by industry SMS. Thank you for your interest in telecom products. I wish you a happy life. If the above information can't solve your problem, you can also log in to Guangdong Telecom Mobile Mall () to seek help from online customer service, which is available 7X24 hours a day!