That cannot be said across the board, but most Chinese manufacturers have noticed that long-term updates are important for the customers. Most large companies like Xiaomi, Oppo, Vivo, Realme, Redmi, Asus, Nubia or Meizu usually offer 2-3 years of software updates and even longer security updates. Thus, the devices from China have no restrictions and usually get the updates quite simply OTA (Over-The-Air) on the device. No matter where you are in the world.