Your understanding is relatively simple, but you can think so. If you want to avoid tax, you must reduce your income and increase your cost, but the way of increase must be legal and explainable. It's not easy to send people from the tax bureau away.
In addition, since 2008, the corporate income tax has been 25%. As a technology company, you can apply for high-tech enterprises. If successful, the tax rate can be 15%.
3. Yes, but the invoice must be legal and recorded for reasonable reasons.
4. Yes, travel expenses can be accounted for, but if the proportion of travel expenses of enterprises is too large, it will arouse the suspicion of the tax bureau.
5. Tax payment must be declared, otherwise the tax bureau will be punished if it finds that your company pays wages and fails to declare tax payment. Moreover, companies that don't pay wages can't explain it. You can reduce the salary of employees, or you can declare more people and share the total salary. As long as the personal salary does not exceed 1600 yuan, the personal income tax only needs to be declared as zero, that is, the final taxable amount is zero.
6. As a company, you need professional financial personnel, and the information obtained from the internet or other channels can't really help you solve practical problems, which will lead to problems. If you don't want to find a full-time accountant, you can try to find an accounting firm as an agent. The cost is not high, and you have no risk.