The main problems at present are: 1) Because the customer has developed a new system (reality os) for the product, but this system currently hopes to be used in conjunction with the ios system, but currently found that there are some related software or compatibility can't do it well; 2) The customer is worried about the later product launch and the computing power of the product is not enough. Currently, one of the existing chips is changed and upgraded. Although the computing power is sufficient, it has adverse effects, and its power consumption and heat generation have increased. So in the case of heat, it needs to use more energy to cool it down, so there are relatively small changes at present. 3) In terms of the yield rate of the screen, the yield rate has not reached the expected value given by us. It must exceed 97%, and reach the relatively high yield rate requirement of 99.1%. This also needs to be coordinated with customers at present, and their suppliers are invited to do it Yield improvement and situation analysis. 4) Currently, data collection in production is also being carried out. Because of data collection such as projection screen, display, and sound frequency, we need to determine a specification with the customer. The range of DB in which its sound is a qualified product can be detected by the screen display. Finally, how much light transmittance is required is a qualified value, so now we need to grasp the range of data collected from previous trial production and assembly processes and provide them to customers, and ask them to confirm subsequent production to ensure that it is within this range It is regarded as a qualified product before leaving the factory, and those that are not within this range will be scrapped or repaired, mainly to do these operations. 5) There is still work on testing items for harmful substances, because the EU has added testing items for harmful substances this year, so we have to do testing items based on EU standards. Because this test is a chemical test, that is to say, it is destructive, and a lot of equipment needs to be put into it for the test. These are things that need to be completed this month. The above is the current preparation status of the product before mass production.