增加：在缺词处加一个漏字符号(∧)，并在其下面写出该加的词。
删除：把多余的词用斜线(\)划掉。
修改：在错的词下划一横线，并在该词下面写出修改后的词。
注意：1．每处错误及其修改均仅限一词;
2．只允许修改10处，多者(从第11处起)不计分。
My 71-year-old grandpa run a small food stand in a night market in my city, provide local snacks for people working overtime. Receiving payments has always been a problem for him before my help. He often had to feel in his pocket for changes on cold nights while keeping eye on food in the oven. After learning this I helped him set up with mobile payment apps like WeChat Pay and Alipay. My grandpa is content with which I did for him, for about 95 percent of his customers now pay with his phones. Mobile payment has become an essential part of our everyday life. It not only deep changes the life of young people, but also provides convenient for the elderly.
