It is mentioned a few places that the Big Boss print they are showing at Thai this screening is 110 minutes. According to some, the original (full) uncut version was around 103 minutes long, while the remastered 4K Blu-ray version is listed to be 100 minutes... I am not sure if that is a miss-print or if it is different because of format (remember the old discussions about PAL vs. NTSC time difference).
"Sunday 14 May 2017 (Open a sales ticket 5 May)
The Big Boss (1971 / 110 min) "