Here is the link for those who are looking for the stock firmware of ZenFone Max Plus ( Chinese X018D ) that bought from Ali Express and the flash tool for the device.
I bought ASUS ZenFone Max Plus (M1) [ZB570TL] [X018DC] from Ali Express and the seller said that the phone is at global version and they added that the phone is [X018D] or the global version. I search the internet and later I discover that the device has an oreo update so I try to download the official firmware update for X018D from asus support site. I'm plan to do a manual update, but when i put the update file, the device won't detect the update. Then I message the seller about the update problem and the seller said that the phone has no update. Later, I discover too that the device is not a real global version or X018D, instead it's a X018DC or the chinese version of the device. So, when I try to flash the official global firmware, after flashing, the device has appeared to be no mobile signal whether I restored it's IMEI properly. Then, I try to flash the device's chinese stock firmware and after the flashing my device mobile signal was back but the problem is the firmware is in chinese version with chinese apps, but there is no google system apps. So, I message the seller about that and I am thankful that they provide me the stock firmware and they send me that firmware link to my google drive. Now my device is back to normal again, except for a problem ( read below ).
**Note Before Flashing**
>Please make a full backup of your NVRAM. As I experience, after flashing for times, I properly flash and restore the IMEI except the serial number. Until now I can't find a solution to write and restore the serial number.
**Calling for development**
>>For long searches about the device, later I discover that unlocking the bootloader for this device is impossible using the ASUS official bootloader unlock tool. The unlock tool is work only on real X018D global version. Maybe this firmware can moddified to unlock it's bootloader in different ways.
>>No root for the device until now. I hope this firmware can develop, soon.