There are two ways to look at it:

(1) If you use WeChat for the first time, you can log in with QQ, and you should be able to leave a message on your QQ mailbox. If your mail hasn't been deleted, you can search for WeChat in your QQ mailbox, and you can see if there is a welcome email from WeChat.

(2) Open WeChat, find "WeChat Team" in the contact list, and click to open it. Scroll down and check the time when the WeChat team first sent you a message.

Wall Street securities analyst Mary Meeker, known as the "Queen of the Internet," released the 2017 Internet Trends Report at the Code Conference on Wednesday, according to a report.

This is also the 22nd time she has published this annual Internet report. In the report, Meeker noted that Chinese smartphone users spend far more time using WeChat than any other mobile app.

Mickel's report showed that WeChat accounted for about 29 percent of the average daily time users spend on mobile apps in April of this year.

The report said the average Chinese user devotes about 3.1 billion hours a day to mobile apps, and about 900 million hours to WeChat. Meeker's data comes from QuestMobile, a domestic mobile big data provider.

Tencent had said last month that WeChat had reached 938 million monthly active visitors, up 23 percent from a year earlier. That puts WeChat close to Facebook's Messenger and WhatsApp in terms of monthly active users.

The two apps had the same 1.2 billion monthly active visitors last month. The number of Chinese users of Apple's apps is not yet known.

Mickel's report showed that mobile apps such as QQ, Baidu's Aqiyi, Alibaba's UC Browser and Weibo all ranked behind WeChat in terms of time spent on them.

WeChat, released in 2011, was one of the first mobile instant messaging apps to integrate other services such as food ordering and payments, and Facebook Messenger, Slack, and Telegram are all already following WeChat's lead.