First, read the Vietnamese article below.

Backpacking backpacks, or rucksacks, need to be sturdy enough to carry a significant amount of weight, but light enough so that you won't be in serious pain at the end of a long hike. Look for a bag with an internal frame, chest straps, and a waist-band to help secure the bag on your body properly.  Backpacking bags are sold at most sporting goods stores, and are matched to your body size and height. It's a good idea to go be fitted for one, to make sure it fits you properly. Your backpack should have enough space for some food and water, a first aid kit, rain gear, sun gear, flashlight or headlamp and batteries, a tent and sleeping bag, even though you might not need all that for a group hike. Hiking isn't hiking without the proper footwear. If you're going to be walking many miles, you want to make sure you're in shoes that will stand up to the stress. The best bet? Get a pair of waterproof boots with enough support and strength to get you through the trip. Never go out for a multi-day trip with nothing but sandals, or a flimsy pair of sneakers. Sometimes, tennis shoes can be great, lightweight, and perfect for hiking in some environments, but you want to make sure you've got something sturdy enough for the terrain you'll encounter. Dressing in layers allows you to be comfortable in many different weather conditions. Even though it might be warm when you hit the trailhead doesn’t mean that the weather will remain the same throughout the day.  Mountains are notorious for volatile and quick-changing weather systems. Even if it is 90 degrees when you head out, pack a light bag with rain gear, or at least a coat. You also need a hat, gloves, sock liners and socks, underwear, lightweight pants and shorts and good sturdy hiking boots.  Try to bring synthetic, wool, or down fabrics, which will keep you warm and dry quickly, instead of cotton. Bring plenty of socks. You'll be walking a lot, and it's important to keep your feet clean and dry on the trip. Hiking in the backcountry usually isn't the time for s'mores... 

Now, please write a short abstract for it in Vietnamese. Abstract:
Get a sturdy backpack that fits your frame. Wear sensible hiking boots. Bring layers. Pack plenty of light-weight, high-calorie food for everyone. Pack as a group, not as individuals. Check your equipment inventory. Pack a whistle and a mirror. Bring maps of the area. Balance your pack properly.