Since you said there are no lyrics, it is not "To the Future" or "The Love of the Past"

This song is included in the original soundtrack of A Better Tomorrow, and its name is : "1. A Better Tomorrow Theme (03:36)Music from "A Better Tomorrow""

Composed by Gu Jiahui, pure music, very classic

Attached is the original soundtrack of "A Better Tomorrow" Album Table of Contents

1. A Better Tomorrow Theme (03:36)Music from "A Better Tomorrow"

2. Fatherly Advice - The Trip To Taiwan (02:26)< /p>

3. Doing Time - 3 Years Later (01:14)

4. A New Leaf - Mark And Sung's Reunion (02:45)

5. Conspiracy (01:22)

6. Sung Chi-Ho's Theme (01:12)

7. Hong Kong At Night (01:05)

8. Mark's Theme (01:37)

9. A Better Tomorrow Theme Song - Instrumental (04:23)

10. A Better Tomorrow II Theme Song - Instrumental (04: 30) Music from "A Better Tomorrow II"

11. Mark's Death - A Better Tomorrow II Opening Scene (01:50)

12. A Better Tomorrow II Theme (Reprise) (01:25)

13. A Better Tomorrow II Theme (Reprise) (01:17)

14. Ken Takes Lung Si Away From the Mental Institution (01:31)

15. Lung Si in New York (01:13)

16. At Becky's Grave (02:17)

17. Operation Commenced (02: 59)

18. Lung Si Regains His Memory (01:08)

19. Assault on Kao's Mansion (01:38)

20. Aftermath - (restaurant re-opens) A Better Tomorrow II End Credits (02:26)

21. A Better Tomorrow Theme (Reprise) (03:39) Miscellaneous Music from "A Better Tomorrow" and "A Better Tomorrow II"

22. Longer Version of Score Used In Scene Where Sung Becomes A Cabby (04:14)

23. Investigation (04:22)

24. "Tomorrow Will Be Better" - I

nstrumental Version of Children's Choir Song (05:24)

25. A Better Tomorrow Theme Song - Instrumental (Reprise) (04:23)

26. A Better Tomorrow II Theme Song - Instrumental (Reprise) (04:30)

27. A Better Tomorrow & A Better Tomorrow II Theme Combo (03:31)

28. Mark's Theme (Reprise) (03 :49)

29. a better tomorrow [Leslie Cheung Leslie Cheung]

The link below is this music, it seems to be slightly different from the arrangement in the movie

/song/714847/#

Listen patiently, at about 1 minute and 20 seconds they will jump over the wall, divide their weapons, and start killing people

The first novel This is the main theme in many classic places such as Marco's return from the pass and etc.