The first way is through blind date. Although this method is old-fashioned, it is also very reliable. You can contact some aunts and grandmothers to see if they know some suitable people, and then you can ask your sister out on a blind date. You know, the ability of seven aunts and eight aunts is still very strong. Their connections are already very strong, and they love gossip. When chatting with others, they can also learn about young people of school age, and then introduce them to your sister, so that your sister can go on blind dates and get to know each other. If you feel good, you can continue to get along. Moreover, blind date people are generally people who know the root of the matter, so it's really a good idea not to worry about being cheated.
The second is a relatively new way, that is, through the Internet, there are now various dating networks. Although the network is not so reliable, it has a wider choice. You should make your request, and then the website will match you with the right person, and then arrange for you to chat and meet. You can also consider this method, but you must remember that safety comes first.
The third way is to participate in some dating programs, such as If You Are the One. Although this dating program may be fake, it can also be considered as a way.
You can choose all three ways, but you must communicate well with your sister, because she may not want to find someone in this way, or she thinks she is fine alone. So you must tell your sister and let her choose.