ZTO Express invited a person to 400 yuan, which is fraud.

Count. Being cheated by 400 yuan belongs to fraud, but it does not constitute the crime of fraud stipulated in China's criminal law. Fraud of 400 yuan, which does not reach the registered fraud amount, does not constitute a crime and cannot be sentenced. Generally, administrative punishment is given by public security organs, with administrative detention 15 days or less. Under normal circumstances, if a criminal suspect swindles public or private property for more than 3,000 yuan to 10000 yuan, more than 30,000 yuan to 100000 yuan, and 500,000 yuan, they are respectively deemed as "large amount", "huge amount" and "extremely huge amount" in the legal provisions. The high courts of all provinces, autonomous regions and municipalities directly under the Central Government may make adjustments within this scope according to the economic development of the region and taking into account the social security situation. How to sentence a criminal suspect depends on the amount of fraud.

According to the relevant laws and regulations of our country, if a criminal suspect swindles a large amount of public or private property, he can be sentenced to fixed-term imprisonment of not more than three years, criminal detention or public surveillance, and concurrently or solely fined. If a criminal suspect commits fraud and the amount involved is huge, he can be sentenced to fixed-term imprisonment of not less than three years but not more than ten years and fined. If the amount of fraud by a criminal suspect is especially huge or there are other particularly serious circumstances, he may be sentenced to fixed-term imprisonment of not less than 10 years or life imprisonment, and also fined or confiscated property. Whoever steals public or private property worth more than 1,000 yuan but less than 3,000 yuan shall be sentenced to fixed-term imprisonment of not more than three years, criminal detention or public surveillance, and shall also or only be fined. Whoever steals public or private property with a value of not less than 30,000 yuan but not more than 100,000 yuan shall be sentenced to fixed-term imprisonment of not less than three years but not more than 10 years and shall also be fined.