Let's just say. At present, testing institutions are divided into government, foreign capital and private (that is, domestic independent laboratories). Generally, independent laboratories have CTI- China Testing, which has been listed. As we all know, AOV- Amt is also an established institution with good qualifications. PONY- PANI is an institution that cooperates with the government, so it is still relatively good in some aspects. Whether the report needs to be stamped generally depends on the contents of the qualification annex of this institution. Some can be stamped, others can't. It's like a dish that's not on the menu, but I have ingredients and so will the chef. But if something goes wrong, I am not responsible, because this dish is not on the menu, and I can be irresponsible.