Durov’s Channel: 确保数百个带有流畅动画的基于矢量的表情符号可以同时在任何手机的屏幕上播放，这是一个有趣的工程挑战。 Telegram 是第一家在移动应用程序中实现此功能的公司。 在任何消息的文本中添加自定义表情符号只是即将到来的 Telegram 视觉革命的第一步。几周后，用户将能够添加任何自定义表情符号作为对消息的反应，并在他们的名字旁边显示一个表情符号作为他们的当前状态。 所有这些都将首先提供给高级订阅者，因为他们使 Telegram 可以为每个人保持免费和私密。

原推：

It was an interesting engineering challenge to ensure that hundreds of vector-based emoji with smooth animations could simultaneously play on the screen of any mobile phone. Telegram is the first company ever to have implemented this in a mobile app.

Adding custom emoji to the text of any message is just the first step of the upcoming visual revolution on Telegram. In a few weeks, users will be able to add any custom emoji as a reaction to a message and display an emoji as their current status next to their name.

All of this will become available to Premium subscribers first, because they are the ones who make it possible for Telegram to stay free and private for everyone.
https://t.me/durov/192