“Let's have a journey. Why not fly out and meet me, Dad?” I say one day.

    My father had just retired after 27 years as a manager for IBM. His job filled his day, his thoughts, and his life. While he woke up and took a warm shower, I screamed under a freezing waterfall in Peru. While he tied a tie and put on the same Swiss watch, I rowed a boat across Lake of the Ozarks.

    My father sees me drifting aimlessly, nothing to show for my 33 years but a passport full of funny stamps. He wants me to settle down, but now I want him to find an adventure.

    He agrees to travel with me through the national parks. We meet four weeks later in Rapid City.

    “What's our first stop？” asks my father.

    “What time is it？”

    “Still don't have a watch？”

    Less than an hour away is Mount Rushmore. As he stares up at the four Presidents carved in granite(花岗岩), his mouth and eyes open slowly, like those of a little boy.

    “Unbelievable,” he says. “How was this done？”

    A film in the information center shows sculptor Gutzon Borglum devoted 14 years to the sculpture and then left the final touches to his son.

    We stare up and I ask myself, “Would I ever devote my life to anything？”

    No directions, no goals. I always used to hear those words in my father's voice. Now I hear them in my own.

    The next day we're at Yellowstone National Park, where we have a picnic.

    “Did you ever travel with your dad？” I ask.

    “Only once,” he says. “I never spoke much with my father. We loved each other — but never said it. Whatever he could give me, he gave.”

    That last sentence — it's probably the same thing I'd say about my father. And what I'd want my child to say about me.

    In Glacier National Park, my father says, “I've never seen water so blue.” I have, in several places of the world. I can keep traveling, I realize — and maybe a regular job won't be as dull as I feared.

    Weeks after our trip, I call my father.

    “The photos from the trip are wonderful,” he says. “We've got to take another trip like that sometime.”

I tell him I've decided to settle down, and I'm wearing a watch.

    For Suilasaikhan, a man living in the Inner Mongolia Autonomous Region(IMAR)(内蒙古自治区), life was hard years ago. When the wind blew, the sand made it almost impossible for him to see anything. He had to find his way back home by following the barking of dogs.

    Thankfully, things are much better today. About one third of the desert is now covered with trees, and sandstorms are less common. Ian Teh, who comes from Malaysia, came to China last year and was amazed to see people planting trees in the several deserts in northern China. "To be honest, it was hard to imagine it was ever a desert at all," he said.

    These are the results of Chinas years-long efforts to deal with desertification (沙漠化). In the 1950s, this widespread problem affected the life of about 400 million people in 18 provinces and autonomous regions in China. So China started several programs to deal with it. For example, the Three-North Shelter Forest Program, saw thousands of trees planted in northern China.

    In 1994, China joined the United Nations' convention (公约) against desertification and created the world's first law on sand prevention in 2001. With these efforts, the past five years have seen the area of desert in China decrease by 242,400 hectares.

    Desertification isn't the problem only in China. With china's success in dealing with desertification, the United Nations Environment Program (UNEP) believes the country is a good example for other countries to follow. "China is one of the most successful countries in greening the desert and has lessons to share with the world." UNEP Executive Director Erik Solheim told Xinhua.

    The purpose of keeping fit is to avoid illness ,resist the mental and physical fatigue（疲劳）that make us more likely to contract infections ,and above all to feel more pleasure in being alive. Research has shown the value of a balanced diet ,fresh air, sunshine ,enough rest and some forms of regular exercise for everyone .If everyone followed this plan ,the number of people visiting the doctor and going to hospital would be considerably reduced.

    Unfortunately, although most people acknowledge the importance of physical fitness, not enough of us put this into practice .We spend too much time watching others from the comfort of an armchair or a seat in the stand at a sports stadium.

    One reason why people who are physically fit to live longer is that they do not put the heart under excessive strain（过度劳累）and so they reduce the risk of heart and blood vessel（血管）diseases .They also avoid suffering the consequences of weakened muscles ,which are the cause of a great deal of back and abdominal（腹部的）trouble.

    About 640 muscles for about 45% of our body's weight, they must have the ability to store energy and be continually supplied with fuel by the blood .Sensible exercise, suited to each individual and preferably undertaken on the advice of a doctor, is the best insurance of meeting these requirements.

    Who is smarter? A human being or artificial intelligence?

The question swept the world last week when a Google-developed program called AlphaGo defeated the world top player, South Korean Lee Se-dol, 4-1.

    So, what comes next?

    Some people have been arguing that artificial intelligence, or AI in short, will be a bad thing for humans. In an interview with the BBC in 2014, UK scientist Stephen Hawking warned that “The development of full artificial intelligence could mean the end of the human race.”

    So are we really about to live in the world shown in the Terminator movies?

    “Not quite,” answered The Economist. After all, it's not hard to get a computer program to remember and produce facts. What is hard is getting computers to use their knowledge in everyday situations.

    “We think that, for the human being, things like sight and balance(视觉平衡), are natural and ordinary in our life.” Thomas Edison, founder of Motion Figures, a company that is bringing AI to boys, told the newspaper. “But for a robot, to walk up and down just like human beings requires various decisions to be made every second, and it's really difficult to do.”

    As The Economist put it, “We have a long way to go before AI can truly begin to be similar to the human brain, even though the technology can be great.”

    Meanwhile, John Mark off of The New York Times said that researchers should build artificial intelligence to make people more effective.

    “Our fate is in our own hands,” he wrote. “Since technology depends on the values of its creators, we can make human choices that use technology to improve the world.”

    Even for a first-time visitor to China, it is impossible to ignore the popularity of Quick-Response (QR) codes. These square-shaped black-and-white symbols in WeChat or Alipay where QR codes are scanned to add new friends or make payments.

    The QR Code system originated in Japan. The engineer Masahiro Hara felt the limitation of the one-dimension barcode in use and thus developed the QR codes which could carry data horizontally and vertically. QR codes could hold much more information than barcode due to their extra dimension. In addition, QR codes have larger data capacity, smaller print—out size and higher resistance to dirt and damage, which make them widely applied in many other applications.

    Though the technology of QR codes is complicated, we can easily create our own QR codes with the help of QR code generators, many of which are available online for free. Users could enter the data they wish the QR code to display, and the generator turns it into a symbol that can be printed or displayed in electronic form. The process of creating QR codes could be really fun when we customise the design of the codes according to our specific needs. For instance, we can adjust the color, add a logo, and create social options etc. Moreover, dynamic (动态的) QR codes are also available. They are more various than standard QR codes because they allow users to edit data entered previously whereas data in standard QR codes cannot be edited once printed. Plus, don't limit your QR code to one mobile scanner. Anyone can scan your code with any reader. A lower barrier to entry makes success more likely for you and the user.

    Meanwhile, we must also recognize the vulnerability of QR codes. Due to its easy access, criminals can steal simply by replacing the QR codes with their own, routing cash into their own bank accounts. Hence, we should all become more conscious towards virtual money transactions through QR codes and participate in additional security measures.

    Anyone wanting to throw away their mobile phone can do it in style（时尚地）and may even win a medal－at the Mobile Phone Throwing World Championship.

    Originally a local event in a small town close to the Russian border, the fifteenth annual contest drew many throwers from as far as Canada, Russia and Belgium.

    Founder Christine Lund describes the event as a good source of light exercise with an environmentally-friendly activity. "There are a lot of mobile phones on the second-hand market, and we are recycling them（before they become poisonous waste）," she said.

    The inventive Finns had already given the world the Sauna World Championships and the Wife Carrying Competition before coming up with a new way to make mobile phones even more mobile.

    This year's gold medal went to Finland's Lassi Etelatalo, who threw a waste Nokia unit a forceful 89.00 meters. "I prepared by javelin（标枪）throwing, I haven't really practiced throwing mobile phones,"Etelatalo said.

    Lund says competitors all have their favorite throwing brand. "People choose by size, by color or by how it fits in the hand……Some believe a heavy model will ensure a long throw, some want a light one."