Final answer:
The establishment of the Ecole Superieure des Beaux-Arts in Hanoi by the French in 1925 influenced Vietnamese artists by introducing them to Western art techniques, emphasizing academic painting and classical subject matters, and promoting restrained color palettes.
Step-by-step explanation:
The establishment of the Ecole Superieure des Beaux-Arts in Hanoi by the French in 1925 provided Vietnamese artists with formal training in Western art techniques and styles.
This French training influenced the work of Vietnamese artists by introducing them to the principles of academic painting, emphasizing precise brushwork, realistic representation, and classical subject matters such as portraits and historical themes.
The French training also emphasized the use of restrained and toned-down colors, often enhanced with a golden varnish.