1. First, download the relevant program files from Alibaba Cloud Disk (SenHaix8900 write file)&Public firmware
https://www.alipan.com/s/SdyMrFhvDYS
2. Follow the instructions provided in the document.
3. (Supplementary) After completing the public network upgrade, you also need to write the Zhu Zhi Da firmware. If this has already been done, please ignore it.
4. Apply for a Zhu Zhi Da account, and preferably purchase through your seller. I recommend the "Weibo Radio Specialty Store" on JD.com. If you haven't purchased yet or plan to in the future, I highly recommend remembering this store. Their service is excellent, and you can also note your request to pay with Zhu Zhi Da during the purchase process, which is perfectly fine. The fee here is 50 RMB/year, which is already a good deal (this is not an advertisement, but a genuine recommendation).
If you have any further questions, please feel free to contact me, and I will do my best to assist you.
If everything goes as planned, we will release an instructional issue (search on dy bilibili for: shark pinch - BI7BJT).
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