The coding rules of VAT invoice codes are adjusted to:
1, bit 1 is 0,
2. The 2nd-5th people represent provinces, autonomous regions, municipalities directly under the Central Government and cities under separate state planning.
3. The 6th-7th digits represent the year, and the 8th 8- 10/0 digits represent the batch.
4. The location 1 1- 12 is 17.
5. The invoice number is 8 digits, which is prepared in batches according to the year.
Extended Information Urea for domestic vehicles is mainly purified from industrial urea, and its main principles are as follows:
1. When the temperature is 70-75℃, urea is hydrolyzed in aqueous solution.
2. When the temperature is lower than 30℃, urea recrystallizes from the aqueous solution.
3. Every time hydrolysis and crystallization, the purity will be greatly improved. Generally, industrial grade urea can be hydrolyzed and crystallized once to meet the standard requirements of vehicle urea, and its yield ratio is 1.5: 1.
Baidu encyclopedia-urea solution for vehicles
State Taxation Administration of The People's Republic of China, People's Republic of China (PRC)-Announcement on Several Issues Concerning the Management of VAT Invoices