The mention of a "Chinese ISO" could imply a few different things:

Within the game's internal options, you can adjust Text Speed and Auto-progress to make the dialogue more readable. Key Game Features

At its core, "The Eagle Shooting Heroes" is a game about strategy and skill. Players control a protagonist on a mission to save the world from invading forces, armed with a variety of weapons that can be upgraded throughout the game. What sets it apart from other shooters of its time is the complexity of its levels and the diversity of enemies, each with their own patterns and weaknesses. The game's difficulty curve is well-balanced, ensuring that players are consistently challenged but never to the point of frustration.

"Shachou Eiyuuden: The Eagle Shooting Heroes (Chinese ISO) - Improved quality."