South Africa is a multiethnic society encompassing a wide variety of cultures, languages, and religions. It has 11 official languages. If you want to say hello, it's "sawubona" in Zulu, and "hallo" in Afrikaans. Now, South Africa's school children may start using "ni hao" to say hello.

    The country's education minister says, the nation is adding the Mandarin language teaching in some schools. Mandarin is the official spoken language of China. That country is a major trading power for South Africa.

    A recent agreement between the two nations centers on five areas of cooperation. They include development in basic education, school books and lessons, mathematics and science, teacher training and career education and research.

    South Africa officials have not said how much they teaching Mandarin will cost. Troy Martens is an officials with South Africa's Ministry of Basic Education. She says the new partnership is extremely valuable.

    A public opinion study last year found that South Africans have mixed feelings about China. The survey showed 46 percent of South Africans do not like the spread of Chinese ideas and customs in their country, the results also showed that 60 percent dislike Chinese music, movies and television.

    But Ms Martens said Chinese trade is more important than those feelings. She said it is extremely helpful to learners in South Africa to study Mandarin as well as Chinese culture. And she said not every school will offer Mandarin.

    “Now this will not be compulsory, it will not be for every school, and it will not be for every child. But for schools that feel they have the capacity to offer Mandarin as a subject, we think it is a great opportunity for South African learners to be exposed to this international type of language,” said Martens.

    Lisette Noonan heads the 80-year-old Pretoria Chinese School in South Africa's capital. The school serves about 500 students from kindergarten to grade 12. Every student studies Mandarin.

    Ms Noonan says the school welcomes the new cooperation between South Africa and China. She said it is in the best interests of children to study Mandarin. She said that especially true with China becoming what she called “a huge economic power in the world”

    Every day, we are inching closer to some kind of artificial intelligence. Advances in big data, machine learning and robotics are going to give us a world where computers are effectively intelligent in terms of how we deal with them. Should you be scared by this? Absolutely, but not in the usual “robot overlords” (机器人帝国) kind of way. Instead, the real fear should be about getting human beings wrong, not getting AI right.

    The key to the technology is the ability of computers to recognize human emotions based on the ‘‘activation” of muscles in the face. A computer can identify the positions of facial muscles and use them to infer the emotional state of its user. Then the machine responds in ways that take that emotional state into account.

    One potential application of it is to provide “emotional robots” for the elderly. Having a machine that could speak in a kind way would comfort a lonely older person. That is a good thing, right? But that won't also relieve us from questioning how we ended up in a society that takes care of the elderly because we don't know what else to do with them? Can't we have more humane solutions than robots?

    “Emotion data” aren't the same thing as the real and vivid emotional experiences we human beings have. Our emotions are more than our faces or voices. How can they be pulled out like a thread, one by one, from the fabric of our being?

    Research programs can come with much philosophical concern, too. From the computers' point of view, what the computing technology captures are emotions, but at its root is a reduction of human experience whose outward expressions can be captured algorithmically (计算上). As the technology is used in the world, it can reframe the world in ways that can be hard to escape from.

    The technology will clearly have useful applications, but once it treats emotions as data, we may find that it is the only aspect of emotion we come to recognize or value. Once billions of dollars floods into this field, we will find ourselves trapped in a technology that is reducing our lives. Even worse, our “emotion data” will be used against us to make money for someone else. And that is what scares me about AI.

    I was very excited on the first day of high school! I had P.E for the first period. We hurriedly gathered in the locker room (衣帽间) when the headmaster began to speak, “Good morning, boys and girls! Welcome to the first day of the great new school year. We will begin with the pledge (誓言) of loyalty.”

    I pulled my shirt over my head and my right hand immediately rested over my heart. A few tears came to my eyes as every time I pledged. I thought of my grandpa. He had died almost a year before, but I still missed him every day. Grandpa served in World War II and the flag had a very special meaning for him.

    The next morning in the locker room, I noticed something strange. Some girls talked through the pledge. After that, even fewer did the pledge, including the teachers. By the second week of school, I was the only girl in the whole locker room that did the pledge.

    The next morning, I hid in the bathroom to change clothes and pledge. There I couldn't see the flag and I had a sense of sorrow to be hiding like that. I kept hiding for the next week and felt worse.

    I spent a weekend gathering up my nerve. On Monday, I changed into my gym clothes right away and was standing by my locker when the headmaster began morning announcements. The pledge started and I put my hand over my heart. A girl nearby locked her locker and asked, “Why are you doing that? ” She looked confused.

    “My grandpa fought in World War II and he died last year,” I said. “I'm doing it for him.”

    She felt embarrassed and looked away. “Oh.” She said.

    Over the next few weeks, more girls questioned me about the pledge. I gave them all that same answer. I never inspired other girls to do the pledge along with me. They made their choice; I made mine. I was doing it for my Grandpa, but more than that, I was doing it for myself. Grandpa raised me to be proud of my country and that pride didn't stop.

    Kong Zi, also called Confucius (551B.C-479B.C, and Socrates (苏格拉底) (469B.C-399B.C) lived only a hundred years apart, and during their lifetimes there was no contact between China and Greece, but it is interesting to look at how the world that each of these great philosophers came from shaped their ideas, and how these ideas in turn, shaped their societies.

    Neither philosopher lived in times of peace, though there were more wars in Greece than in China. The Chinese states were very large and feudal (封建的), while the Greek city-states were small and urban. The urban environment in which Socrates lived allowed him to be more radical (激进的) than Confucius. Unlike Confucius, Socrates was not asked by rules how to govern effectively. Thus, Socrates was able to be more idealistic, focusing on issues like freedom, and knowledge for its own sake. Confucius, on the other hand, advised those in government service, and many of his students went out to government service.

    Confucius suggested the Golden Rule as a principle for the conduct of life: "Do not do to others what you would not want others to do to you." He assumed that all men were equal at birth, though some had more potential than others, and that it was knowledge that set men apart. Socrates focused on the individual, and thought that the greatest purpose of man was to seek wisdom. Like Confucius, he believed that the superior class should rule the inferior (下层的) classes.

    For Socrates, the family was of no importance, and the community of little importance. For Confucius, however, the family was the center of the society, with family relations considered much more important than political relations.

    Both men are respected much more today than they were in their lifetimes.

    The United States estimates that about one out of every 10 people on the planet today is at least 60 years old. By 2050, it's projected to be one out of 5. This means that not only will there be more old people, but there will be relatively fewer young people to support them.

    Professor Richard Lee of the University of California at Berkeley says this aging of the world has a great effect on economics. "Population aging increases the concentration of population in the older ages and therefore it is expensive," he said.

    Aging populations consume (消耗) more and produce less. With more people living longer, it could gel expensive. But Mr. Lee says with continuing increases in worker productivity and wise planning, it can be manageable.

    Societies have different methods for caring for the elderly，but each carries a cost Generally, there are three types of support Seniors can live off the wealth they gained when they were younger. They can rely on their family to take care of them, or they can rely on the movement.

    In industrialized nations, governments created publicly-funded (公共资助的) support systems. These worked relatively well until recent years, when aging population growth in places like the United States and Western Europe began to gradually weaken the systems' finances(资金). These nations now face some tough choices. Mr. Lee says the elderly in some of these countries must either receive less money, retire later or increase taxes to make the system continuable.

    Most developing nations haven't built this type of government-funded support, but have instead relied on families to care for their elderly. These nations also generally have a much younger population, which means their situation is not as urgent as more developed nations. But Mr. Lee says that doesn't mean they can pay no attention to the issue. "Third World countries should give very careful thought to this process, to population aging and how it may affect their economies — now, before population aging even becomes a problem," he explained.

Painting is an ancient medium and even with the introduction of photography, film and digital technology, it still has remained a persistent mode of expression. So many paintings have come into being over the years but only a small percentage of them could be described as "timeless classics". The following are some of the most famous paintings of all time. 

Leonardo Da Vinci, Mona Lisa, 1503—1519

Painted between 1503 and 1519, Leonardo da Vinci's attractive portrait has been a subject of controversy since the day it was made, due to two questions: Who's the subject and why is she smiling? A number of theories for the former have been provided over the years: That she's the wife of the Florentine merchant Francesco di Bartolomeo del Giocondo and that she's Leonardo's mother, Caterina. As for that famous smile, its quality has driven people crazy for hundreds of years. 

James Abbott McNeill Whistler. Arrangement in Grey and Black No. 1. 1871

Whistler's Mother, or Arrangement in Grey and Black No. 1, as it's actually titled, speaks to the artist's ambition to pursue art for art's sake. James Abbott McNeill Whistler painted the work in his London studio in 1871. Whistler's mother Anna is pictured as one of several elements locked into an arrangement of right angles. Her severe expression fits in with the rigidity of the composition, and it's somewhat ironic to note that despite Whistler's formalist intentions, the painting became a symbol of motherhood. 

Jan van Eyck, The Arnolfini Portrait, 1434

As one of the most significant works produced during the Northern Renaissance, this composition is believed to be one of the first paintings finished in oils. It portrays an Italian merchant and a woman who may or may not be his bride. In 1934. the celebrated art historian Erwin Panofsky proposed that the painting is actually a wedding contract. What can be reliably said is that the piece used orthogonal perspective to create a sense of space. It feels like a painting you could step into.