It takes 1-5 working days to process the Tianjin foreign trade permit. When applying for a foreign trade permit in Tianjin, the longest application period shall not exceed 180 days, and the validity period is generally 30 days, which is usually 1-5 working days. After the expiration, you need to apply to the tax bureau for extension or cancellation. The foreign trade permit generally refers to the tax management certificate of going out for business activities. The tax management certificate of going out for business activities refers to the taxpayer who temporarily engages in production and business activities in other counties (cities). Before going out for production and business operations, he should apply to the competent tax authorities for the tax management certificate of going out for business activities with the tax registration certificate.