My decision to travel around China lay merely with my curiosity about the place. Before coming here, China seemed alien to me —-a place that expected to be hugely dissimilar from my own British culture.

After travelling from Beijing up to Xi'an, I wanted to challenge myself by choosing a smaller town—-Xiahe in Gansu Province. I arrived in Lanzhou at around 5 am, but there were no buses to Xiahe. I managed to spot a policeman and attempted to explain my destination to him in simple English, praying that he would understand. I wasn't sure that he did but I just followed him anyway as I had no choice. He took me on a bus and I didn't know where I was going. Luckily, I met a student who explained to me in English that the policeman was taking me to another bus station where I could take a bus to Xiahe. During this conversation a third man said he was also a policeman and would help me buy tickets. But as he was not in uniform, I was a little doubtful. The uniformed policeman told me it was OK to go with the third man, so I got off the bus with the so-called policeman who at this point, disappeared and I was left in the middle of nowhere. I stood panicking. Around one minute later a police car came and stopped right by me. It was the un-uniformed policeman. I got into the car and he dropped me directly at the bus station, and helped me buy the ticket.

    This is one of many experiences that I have had in China. I realized that however different this culture was, there was one thing that would always stand out—kindness. In the west we seem to lack the foundation of trust, yet in China it seems that there will always be someone to answer your questions and lead you the right way.

    Google, one of the world's outstanding tech companies, was attacked. It wasn't its search engine that was attacked or its advertising platform or even its social network. Google⁺. Instead, it was a building.

    Two web security experts hacked (侵入) into its Wharf 7 office in Sydney, Australia, through Google's building management system (BMS). One of them, Billy Rios, says, “My colleague and I have lot of experience in web security, but it is not something that people couldn't learn. Once you understand how the system works, it is very simple.

    They found the system on Shodan, a search engine that lists devices connected to the Internet, and then ran it through their own software to identify who owned the building. In the case of the Google hacking, the researchers had no immoral purpose and just informed Google about what they found.

    According to Mr Rios, who runs security company Whitescope, there are 50, 000 buildings currently connected to the Internet, including research institutes, churches and hospitals, and 2, 000 of those are online with password protection, Martyn Thomas, a professor of IT at Gresham College in the UK, says, “It is beyond doubt that attempts to attack building management systems are happening all the time.”

    Making a building smart generally means connecting the systems that control heating, lighting and security to the Internet and the wider corporate network. There was a strong reason for doing this, said Andrew Kelly, principal security consultant at defence company Qinetiq.

    “Energy savings are the biggest factor in connecting building management systems to the corporate network,” he says. “It gives those who run the building better control and offers between 20% to 50% in energy savings,” he adds.

    But it also makes them less secure. And if any of these feels like a Hollywood filmy, think again.

    Most of us have been in this situation: You're on your way to your friend's house, then you suddenly ask yourself,"Did I remember to turn the lights off?” For those with "smart homes", however, this wouldn't be a problem.

Over the last few years,smart home technology has become more popular. Thanks to user-friendly products like intelligent lighting and heating controllers, people can control nearly every electrical item in their homes from anywhere in the world.

    While smart homes aren't new, companies like Philips, Amazon and Xiaomi have finally brought automation to everyday people with affordable products like artificial intelligence(AI) speakers and sensors.

    “The obvious message is that you can stop wasting energy,” Tom Kerber, director of research for U. S -based digital company Parks Associates, told The Guardian.

    And the technology also has more meaningful uses. In Norway, for example, one company is using smart tech to make life easier for its elderly customers. Abilia's system allows carers to check up on patients through a tablet on a wall inside their home. The device sends patients reminders about tasks, such as when they need to take medication(冥想). It can even tell carers if there's any unusual activity in the home that could be life-threatening.

    “This kind of system allows people to take care of themselves, which is the most important thing,” Abilia's vice president, Oystein Johnsen, told the BBC. "It also saves the government money. In Norway, it costs 1 million kroner(about 0. 8 million yuan )per year to have someone in a care home. This system costs 15,000 kroner a year.”

    So, for those who have already "gone smart", will it ever be possible to go back to do things in the old-fashioned way? "I think it would be difficult. When we go to a friend's house or on vacation we find ourselves expecting the house to do things for us that we should do, "Poulson, 35, a senior program manager from Seattle.,U. S.,explained.

    Dave Merry and his tools have been through a lot together. The tools helped Dave, now 80, repair his home in St. Paul, Minnesota, where he and his wife, Annette Merry, lived for 46 years and raised three children. The table saw, the jointer plane, the drill press, and the dozens of other power and hand tools had pride of place in his carefully organized workshop. "I had a whole setup, and it was beautiful," says Dave, a retired engineer.

    But then Annette experienced a stroke (中风) that left her relying on a walker to get around, and the Merrys decided to move into assisted living. Dave's workshop was obviously a minor consideration given Annette's condition, but the family knew that giving it up, on top of everything else, would hurt.

    It was the Merrys' daughter who came up with a possible solution. She'd heard about some people who were setting up a tool library—a nonprofit facility that would lend out tools just as a regular library lends books. Might Dad be interested in donating his?

    "I said yes," Dave says.

    The people creating the St. Paul Tool Library were thrilled. They had expected it would take a year to collect enough tools to make their facility fully functional. Instead it took one day: the day Dave donated his.

    The library's founders drove over to the Merrys' house and picked everything up themselves. The library is housed in the basement of the American Can Factory. Members pay an annual fee (from $20 to $120) for unlimited tool use and a varying number of visits to the workshop. And they get an extra benefit: Dave Merry. "Almost every time we're open, Dave's here," says one of the founders, Peter Hoh. "It means a lot to me to be able to go and use my tools," Dave says. "But it means just as much to help DIYers use the tools properly."

    As Hoh puts it, "This is his workshop now."

    Sparrow is a fast－food chain with 200 restaurants. Some years ago，the group to which Sparrow belonged was taken over by another company. Although Sparrow showed no sign of declining，the chain was generally in an unhealthy state. With more and more fast－food concepts reaching the market，the Sparrow menu had to struggle for attention. And to make matters worse，its new owner had no plans to give it the funds it required.

    Sparrow failed to grow for another two years until a new CEO，Carl Pearson，decided to build up its market share. He did a survey，which showed that consumers who already used Sparrow restaurants were extremely positive about the chain，while customers of other fast－food chains were unwilling to turn away from them. Sparrow had to develop a new promotional campaign.

    Pearson faced a battle over the future of the Sparrow brand. The chain's owner now favored rebranding Sparrow as Marcy's restaurants. Pearson resisted，arguing for an advertising campaign designed to convince customers that visits to Sparrow restaurants were fun. Such an attempt to establish a positive relationship between a company and the general public was unusual for that time. Pearson strongly believed that numbers were the key to success，rather than customers' spending power. Finally, the owner accepted his idea.

    The campaign itself changed the traditional advertising style of the fast－food industry. The TV ads of Sparrow focused on entertainment and featured original songs performed by a variety of stars. Instead of showing the superiority of a specific product，the intention was to put Sparrow in the hearts of potential customers.

    Pearson also made other decisions which he believed would contribute to the new Sparrow image. For example，he offered to lower the rent of any restaurants which achieved a certain increase in their turnover(营业额).

    These efforts paid off，and Sparrow soon became one of the most successful fast－food chains in the regions where it operated.

    Physical education, or PE, isn't required for all high school students. In some schools, it isn't offered for some different reasons. But should high school students have physical education? The answer is certainly "yes".

    Today many people don't do sports. But as is known to all, doing sports is very important for an adult. Teaching teens the importance of a healthy lifestyle and making fitness plans now can help teens put exercise in the first place as an adult.

    High school isn't that easy. Many students are under a lot of stress. Stress can be harmful to a student's studies and life. Doing sports can help them deal with stress better, helping them live a happier life at school.

    The American Heart Association says that 10 million kids and teens suffer from obesity (肥胖症). Teens should get 60 minutes of physical activity per day to control their weight and to help their bones get stronger. The increase in activities that don't get teens to move around, such as video games and computer activities, means many teens don't get their required exercise. PE classes act as a public health measure to encourage physical activities and help teens have healthy weights.

    Not doing sports increases teens' risk of developing many diseases. An active lifestyle offers a good way of protection from these health problems. As much as 75 percent of health-care spending goes toward treating medical conditions that can be hindered by lifestyle changes, according to the American College of Sports Medicine.

    According to the President's Council on Fitness, Sports and Nutrition (PCFSN), students who performed five hours of physical activity each week improved their academic (学业的) performance. Students from programs with no physical activity, who used the extra time for classroom study, did not perform better on tests than those who gave up some study time in support of physical education.