Meaning of lì mǎ:
立马
at once; immediately; promptly; swiftly
Wǒ tīng dào xiāo xi hòu, lì mǎ chū fā qù jiàn tā.
我听到消息后,立马出发去见他。
After hearing the news, I set off to see him at once.
Tā yī shōudào xiāoxī jiù lìmǎ gǎndào le xiànchǎng.
他一收到消息就立马赶到了现场。
As soon as he received the message, he immediately rushed to the scene.
Tā tīngdào xiāoxī hòu lìmǎ líkāi le.
他听到消息后立马离开了。
He left promptly after hearing the news.
Qǐng nǐ lì mǎ qù chákàn zhège wèntí.
请你立马去查看这个问题。
Please go check this issue swiftly.