Using your Merida Big Nine 200 X1 is easy. First, adjust the seat and handlebars to your comfort. When riding, use the 1x10 Shimano gear system to adapt to different terrains. For bumpy roads, unlock the 100mm travel Suntour front fork. When you need to stop, rely on the Shimano hydraulic disc brakes. As for maintenance, regularly check the tire pressure and keep it at the recommended level. Clean the bike after every ride to prevent dirt buildup. Lubricate the chain every few rides to ensure smooth shifting. And don't forget to check the brakes and gears for proper functioning. Also, if you plan to install a kickstand, rear rack, or fenders, use the integrated mounts provided.