Why did the rocket launched by Xichang fly obliquely in Xiamen?

After that, it won't fly up all the time, because if you want to enter the universe, you must first enter the orbit around the earth, and then adjust your attitude to accelerate your departure from the earth ~ ~ ~

If you were here,

Xiamen saw the rocket (because Xiamen should be far away from Xichang), so the rocket you saw should have begun to tilt into orbit around the earth ~ ~ ~