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    Although travelers can try dishes from around China and the globe in well-known food cities like Beijing and Shanghai, it is outside these major metropolises where a world of exciting Chinese cuisine(中国菜) awaits the true foodie(美食家). With this in mind and after three years of living in China and writing about Chinese food, I started a six-month journey with my husband and two daughters.

    Here are four of the eight most amazing Chinese food cities I've come across so far. The list is in no particular order.

1 Chengdu, Sichuan Province

    Crowned as Asia's first UNESCO City of Gastronomy(美食学) in 2010, Chengdu is best-known for its fiery hot pot and spicy dishes, which are characterized by the use of Sichuan pepper and are usually layered with salty, sour and sweet flavors. There are also dishes that aren't spicy at all, such as beer-braised duck.

    Hot pot is as ubiquitous in the city as the smell of chili. At Zigong Delicious Hotpot, the house specialty(招牌菜) tiaoshui wa is a cauldron(大锅) of fiery chili(辣椒) to which vegetables, noodles or other meats can be added.

    For a real taste of Sichuan's signature（招牌）pepper, hua jiao, spend a morning at the Chengdu Spice Market where the locals sell and buy it by the sack.

2 Lanzhou, Gansu Province

    Synonymous in the minds of food-lovers with hand-pulled beef noodles, Lanzhou also has one of the liveliest street food night markets in China.

    Just west of the city center, the buzzing Zhengning Road bazaar（集市）houses more than 100 street food stalls. Available is a broad selection of hot and cold dishes with emphasis on local Hui cuisine.

    No trip to Lanzhou is complete without feasting on noodles at Wumule Penhui, the 2012 winners of Lanzhou's annual pulled noodle competition. The halal restaurant makes noodles spicy enough to satisfy even the most hardened heat-seekers.

3 Guangzhou, Guangdong Province

    The birthplace of Cantonese food, Guangzhou is thought by many as the best place to eat in China. The city of 12 million has a passionate food culture, with equal excitement reserved for the opening of a hole-in-the-wall congee joint（粥店）and a high-end restaurant.

    The local cuisine is characterized by fresh clean flavors（口味）, seafood, barbecued meats and the wonderful tradition of yum cha, which is tea drinking accompanied by dumplings and small dishes.

    Congee is the way locals love to start their day, and one of the most popular vendors is Ru Xuan Sha Guo Zhou. Here, one can get a bowl of signature seafood congee any hour of the day.

    Roast meats are Bing Sheng's most popular order—their roast goose is marinated（腌制）with five-spice, boiled, air-dried, then roasted by a flame oven to give a crisp skin.

    For something more home style and removed from the madness of downtown, head to Ji Cun for steamed chicken and simple farmer-style dishes.

4 Shaoxing, Zhejiang Province

    This ancient canal city is home to huangjiu, an amber-colored rice wine that's important in Chinese cooking.

    Open since 1894, the dining chain is known by almost every Chinese for its appearance in early 20th century novels by Chinese literati Lu Xun.

    Xianheng's delicacies（佳肴）include crispy-skinned chicken, smoked red dates in rice wine, beans flavored with fennel(茴香), and crispy bream in rice wine.

    Fried fermented（发酵的）tofu is also a local specialty, which is available all over town at small street stalls including one just outside Xianheng.

    Teachers say the digital age has had a good influence and a not-so-good influence on this generation of American teenagers. More than 2,000 high school teachers took an online survey.

    75 percent of the teachers said the Internet and digital search tools have had a “mostly positive” effect on  their students' research habits and skills. But 87 percent agreed that these technologies "make the students not have enough attention.” And 64 percent said the technologies “do more to distract students than to help them academically.”Many students think “doing research” now means just doing a quick search on Google.

    Judy Buchanan is a director of the National Writing Project. Ms. Buchanan says digital research tools are helping students learn more, and learn faster. Teachers really like these tools, because they are ways to make some of learning exciting. Young people enjoy using these tools. And the goal is to help them become creative students of meaningful work, and not just that kind of copyist.

    But one problem the survey found is that many students don't have a good understanding of how to use the digital knowledge well. In other words, they trust(信任) too much of the information. Judy Buchanan says these students have not developed the skills they need to tell whether the online information is good or bad.

    Another problem the survey found is something that might not seem like a problem, at all, being able to quickly find information online. Teachers say the ability of their students to work hard to find answers is becoming weaker. They say students depend too much on search engines (引擎) and do not make enough use of printed books or research, librarians.

    Besides, many teachers are also worried about the problem that the Internet makes it easy for students to copy work done by others, instead of using their own abilities.

    Eat your vegetables.Wash your hands.Always say“please”and“thank you”.We are full of advice for our children, but when it comes to money,we often have little to say.As a result,our children may grow up with clean hands and good manners,but without any idea how to manage their money.

    Here are some basics that will help guide them their entire lives:

    Show them the future.If your 13-year-old girl were to save $1.000,invest（投资）it at 8% and add $100 every month,by the time she's 65,she would have $980,983!

    Be careful of credit（信用）.Credit cards can help you buy necessary things and build a credit history,but they must be used responsibly,which means paying off your debt in time.Explain to your children that when you buy something using a credit card,you can easily end up paying two or three times what you would have paid if you used cash.

    Teach patience.Suppose your child wants a new bicycle that costs $150.Rather than paying the cash,give him some regular pocket money and explain that by putting aside,say,$15 each week,he will be able to buy it for himself in only ten weeks.

    Provide incentive（激励机制）.Tell your children the importance of saving."For every dollar he or she agrees to save and invest rather than spend,you agree to add another dollar to the pot,"says Cathy Pareto,expert in money planning.

    Explain your values.Values and money are deeply intertwined（纠缠在一起）,says Eilleen Gallo,co-author of The Financially Intelligent Parent.When your child demands that you buy something,explain why you really don't want to buy it.“You might say,‘I'd rather save that money for your education,'”advises Gallo.Every time you spend or don't spend money,you have a chance to share your values.

    The vast majority of us spend our entire lives pulled down by gravity. Then there are astronauts.

This small population of space travelers has given researchers a rare look at what happens to the human body when it's able to spend large amounts of time outside the downward pull of the Earth. This week, a study on one of the largest groups of astronauts yet —34 participants—was published in The New England Journal of Medicine.

    In the new study, a team of international radiologists supported by NASA looked at MRIs of the brains of astronauts before and after their trips to space. The scientists found that upon returning to Earth, many of the astronauts' brains had become repositioned inside their skulls, floating higher than before. In addition, the space between certain brain areas appeared to have shrunk. The changes were more common in astronauts who took longer trips into space.

    The team characterized astronaut trips as short (an average of less than 14 days) or long (an average of about 165 days). Radiologists who didn't know each astronaut's duration（持续时间）in space compared MRIs from before and after their trips.

    Of the 34 total astronauts involved in the study, 18 took long trips to space—spending most of that time on the International Space Station —and of those, 17 returned to Earth with smaller areas between the frontal lobe（脑前额叶）and parietal lobe（顶叶）. The same area of the brain also shrank for three of the 16 astronauts who took shorter trips with the US Space Shuttle Program. The researchers also found that 12 of the ISS astronauts and six of the space-shuttle astronauts returned home with their brains sitting slightly higher in their skulls than before.

    It's not clear what, if anything, these brain changes mean for the health of space travelers. In general, it appears the human body tolerates space travel fairly well: the time astronauts have spent in zero-gravity environments so far doesn't seem to have had any strong or long-lasting effects.

    A thrilling polar competition between two adventurers to cross Antarctica alone, unsupported and unassisted had a happy ending with both explorers achieving the unprecedented feat (功绩). American professional athlete Colin O'Brady and British Army Captain Louis Rudd set off a mile apart at the same time on November 3, 2018, from the Atlantic coast with the aim to become the first person to ski across the remote continent alone.

    Louis Rudd maintained the lead at first. However, O'Brady caught up with Rudd on November10 and never let the British man get close to him again. O'Brady was the first to conquer the 930 mile icy land, arriving at the Ross Ice Shelf on the Pacific coast by way of the South Pole on December 26, 2018. The 33-year-old spent 54 days skiing the world's coldest continent while pulling a 300-pound sled(雪橇) with supplies.

    Instead of leaving the harsh environment after completing the historic adventure, the explorer set up a tent on the world's largest ice sheet and waited patiently for Rudd to complete the great undertaking. On December 29, just three days after O'Brady arrived, the British explorer finished his adventure, becoming the world's second person to complete the solo crossing of the frozen continent.

Rudd was not disappointed at being second since he never considered it to be a     "race". Besides, the 49-year-old British Army Captain had a more selfless motive for attempting the feat. He was doing it in memory of his friend Henry Worsley, who had introduced him to polar exploration. The disaster happened while Worsley was trying to cross the continent alone in 2016. Rudd said, "I didn't want to get drawn into a race. All that mattered to me was that I completed it, and that I skied solo and unsupported, carrying the flag with Henry's name on it."

    After spending a few days camping 10 feet away from each other, the two adventurers were picked up by a helicopter to the South Pole scientific research station.