You might not pay much attention to whether the things you say on WeChat and other online messaging apps are recorded. But a regulation (规定) that went into effect on May 1 will make everything you say online usable against you in a court of law (法庭).

    According to the Supreme People's Court's regulation, text messages, emails, and content posted on websites or instant (即时的) messaging platforms can be used as evidence (证据) in civil lawsuits (民事诉讼).

    The idea of digital evidence was first introduced as part of China's Civil Procedure Law in 2012. However, the recent regulation has made it clearer.

    "This is the first time the Supreme People's Court has clarified (阐明) the scope of digital evidence, especially on social media platforms and instant messaging services," Li Ya, a lawyer in Beijing, told China Daily.

   The regulation was introduced to keep up with changes in social development. Social media activity has become a part of most people's lives. Therefore, digital evidence is playing an increasingly important role in civil and criminal lawsuits.

    According to the regulation, if people plan to use digital evidence in a lawsuit, they have to first prove that they use the app or website that the evidence comes from. Second, they must provide an original (原始的) and complete record of the evidence. For example, if you lend somebody money through WeChat, you must keep the original transfer (转账) records and conversations on the app.

    However, there are still questions about the regulation. Some point out that the regulation will not necessarily help in every case. "How to make sure a microblog was actually posted by the micro blogger is a challenge," Li said.

    IQ scores have been measured (测量)since 1916, when Alfred Binet developed his intelligence list as follows:

    Some very famous people are known for their high IQ level. Jill St. John who has the highest score on this list was a major American film actress during the 1960's and 1970's. Jill was chosen to the University of California at the age of 14.

    Scientists have estimated (估算)the IQ scores that some famous historical people might have got. This was done by looking at their work and their ideas and the way they put them together Leonardo da Vinci gets that high score not only for his art but also for his idea of the helicopter (直升飞机). Without modern scientific tools, he created a lot of design drawings and patterns, which was ahead of his time.

    Where were dominoes (多米诺骨牌) from? Modern dominoes first showed up in Italy during the 18th century. But it is believed that the earliest dominoes were Chinese playing cards. Italian missionaries (传教士) in China may have brought the game to Europe. Do you think so?

    Do you like to play with dominoes? Dominoes are small rectangular (长方形的) pieces made of wood or plastic (塑料). People can place dominoes in different shapes. Then, they push one domino down and the rest of the dominoes fall one by one. It is interesting to watch.

    But placing dominoes is hard. To make sure the dominoes fall smoothly, the space between each domino is important. According to domino—play. com, if a domino is about 4 cm long, then the space between two dominoes should be1—2 cm. If the space is too big, the dominoes will stop falling halfway. If the space is too small, the dominoes will fall too quickly and won't look interesting.

    Beginners can start by putting dominoes in a straight line. This is the easiest shape. Professional (专业的) players can place dominoes in many other shapes, including big circles, beautiful flowers and even famous paintings.

    On Feb. 26th, 2020, when an Italian went to work with a mask to prevent COVID-19, his workmates thought he was "causing panic(恐慌)". You might wonder why the East and the West have different ideas about wearing masks.

In the West, people wear masks only when they get sick. People see masks as a tool(工具) to protect sick people and prevent the disease from spreading, so healthy people don't need to wear masks. Wearing masks in public easily makes them feel "worried" and "shy". They are "afraid of being looked at differently."

However, it's common in Asia. During the 2003 SARS epidemic, masks were widely used in China and East Asia. Many Chinese also like to wear masks to stay warm in winter or protect against air pollution.

In Japan, wearing masks shows your politeness when you get a cold or the flu. Some masks even have different colors and drawings. Young women may wear masks when they don't have their makeup on. Many pop stars in Asia also use masks to protect their privacy(隐私). This makes people in the East wear masks more often when epidemics break out(爆发).

But as the number of COVID-19 cases keeps on growing around the world, people in the West are changing. Many healthy people are starting to wear masks now to protect themselves.