The video was published here on Facebook on August 20, 2020. It has been viewed more than 6,000 times.
The 47-second footage shows what appear to be military vehicles travelling on railway tracks.
Screenshot taken on September 15, 2020, of the misleading Facebook post
Part of the post's traditional Chinese-language caption translates to English as: "Military train heading to Fujian in plain sight so the world can witness how the People's Liberation Army is preparing to attack Taiwan."
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Fujian is a province in southeast China, close to Taiwan.
Tensions between China and Taiwan flared up once again in August 2020 when a Czech delegation visited Taipei in a second high-profile visit to the island in a month, AFP reported here.
The video was also published on Facebook here, here, here and here alongside a similar claim in August and September 2020.
However, the video has been shared in a misleading context.
A reverse image search using keyframes extracted from the video in the misleading post found a longer version of the footage published here on YouTube on August 14, 2017.
The footage in the misleading post can be seen from the YouTube video's two-second mark.
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Below is a screenshot comparison between the video in the misleading post (L) and the 2017 YouTube video (R):
Screenshot comparison between the video in the misleading post (L) and the 2017 YouTube video (R)
The claim was also debunked by Taiwanese fact-checking organisation MyGoPen here.