WeChat — Tencent’s signature product, and China’s biggest social network with a monthly active user base of nearly 1.1 billion — released a major update Friday night. WeChat 7.0 officially went online that evening, four years after the release of its previous major upgrade, version 6.0. The new version features improvements in short video streaming among other features.

A new feature, called “Time Capsule,” is seen as the most significant part of the update. Time Capsules resembles Instagram Stories — users can post videos that disappear a day later. Alerts appear in messaging groups once a member publishes a new short video. It is not clear whether the videos will enter WeChat Moments.

Another feature in this new version is “Top Stories,” in which content shared by a user’s friends will be displayed in the user’s interface. The section will also recommend stories that match a user’s personal interests — a feature similar to ByteDance’s news app Jinritoutiao.

The active user base of WeChat grew from 500 million to 1.08 billion in the four years since version 6.0 was released, and is still growing. While WeChat was once the undisputed social-media champion, the app’s parent company, Tencent, is now facing increasing challenges from its latest rival, ByteDance, whose app, Douyin (known in English as TikTok), is vying for users’ attention. The competition explains Tencent’s extra efforts in short video in the WeChat update.