How did ancient China's military strength compare to the West such as Qin, Han, and Tang. How does the strength rank in the world?

Ignoring geographic isolation and army logistics,

1. Alexander's Macedonian expeditionary force was unquestionably superior to the Qin army.

2. The Han Dynasty and Rome should have been evenly matched in terms of national strength alone. However, there is no information left from the Han Dynasty about the battle tactics, so it is impossible to speculate on the specific military level of the Han army. The Roman legions' weaponry and soldiers' armor rate were a notch higher than the Han army, and the number of professional armies on both sides was roughly equal.

The Han Dynasty would have crushed any country other than Rome without a doubt, and the reverse is equally true. The countries I'm talking about here also include the Huns.

3. The Tang Dynasty at its height was a global powerhouse. The Tang army was slightly more powerful than the Tubo, and probably comparable to that of Eastern Rome during the Macedonian dynasty.

4. The Song dynasty's army was generally scummy as shit. The armies during the founding of the two Songs were watchable, roughly average, and lost their combat power quickly.

5. The early Ming dynasty's military strength was okay, in the upper middle class of the world. The late Ming dynasty in addition to individual border army overall is also crummy as shit, may not be as good as the Song army. In the late Ming Dynasty, both weaponry and tactics have fallen behind the West to a greater extent.

6. The Qing Dynasty, until the Sino-Japanese War, fought for more than two hundred years in the north and south, and the Eight Banners army was always the strongest army in Asia, and its fighting strength was maintained very well. The Qing Dynasty and the rest of the world horizontal comparison, the military level of roughly and after the decline of Turkey a grade, slightly weaker than Russia. After the Qianlong dynasty, the West began the industrial revolution, the Qing dynasty directly into the mainstream.