Obviously not strong enough. Speed up, don't run at a constant speed. Variable-speed running is to speed up and slow down for a while, and adjust it randomly according to your own situation, so that you can lose weight.

And the intensity of 5 kilometers at a time is still a little small for weight loss. Since you've been running for a month, I suggest you increase your intensity from now on, more than 15 km per day, and of course don't get tired.