Xiaomi 4C how to identify flash chip?

Just bought 2x Xiaomi R4CM.
Have already open the device but cannot find any chip with either
EN25QX128A or GD25Q128C or W25Q128
The only is the mediatek MT7628DAN and a gigabyte lan chip 8 pin (250127CS1G)
The board version is V1.3
Any hints to identify ram chip. I don't want to brick the router

The 8 pin chip is the flash chip. That's 25Q127 which is the good old one.

Thanks a lot. Will try Monday to flash a device to test!