Given the risks, many users regret flashing. Instead, consider a "soft" conversion:
The Oppo A5, released in 2018, was a popular budget device known for its diamond-textured back and large battery. However, many units purchased online or imported come with the (ColorOS China) pre-installed. While the hardware is identical, the software experience is vastly different from the Global ROM intended for international markets. Oppo A5 China To Global Rom