CCTV1 — -4K
20261010 181800 UTC
98 transcript segments
Google Cloud Speech-to-Text API (Chirp) + Gemini 2.5 Flash Non-Thinking
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Machine transcription. Treat it as a searchable index of what was broadcast, not a verbatim quotation record.

[00:01:02] In autumn, walk into the valley of Pingnan County, Fujian Province
[00:01:06] , and you will definitely notice them
[00:01:08] .
[00:01:10] On the same hillside, most of the trees are still green.
[00:01:14] Only this Metasequoia, seen from a distance like
[00:01:17] fire, is tall and short , and stands out
[00:01:21] among the green mountains . What is more special
[00:01:24] than the colors is their rarity
[00:01:27] . Global wild Metasequoia
[00:01:36] is listed as critically endangered in the IUCN Red List of Threatened Species
[00:01:40] . level
[00:01:42] .
[00:01:45] And this ancient Metasequoia forest hidden in the Pingnan
[00:01:49] valley is actually the largest native
[00:01:52] Metasequoia community
[00:01:54] in the world.
[00:02:04] Walking into the valley, the soil underfoot began to become soft ,
[00:02:08] this
[00:02:10] approximately 4,000 square meter alpine wetland is the home
[00:02:14] of Pingnan Metasequoia
[00:02:15] .
[00:02:20] pn63,172. PN 53,172.5
[00:02:24] PN6,293
[00:02:27] . No. 65 is 22 meters high .
[00:03:21] This is the secret of Metasequoia's unique breathing roots, like
[00:03:25] a natural oxygen bar, allowing it to breathe freely
[00:03:29] in oxygen-deprived mud.
[00:03:32] In addition, the base of the Metasequoia trunk is swollen into a mound shape
[00:03:35] , like stone piers, firmly rooted in the soft
[00:03:39] wetland to resist water erosion. The tannin acid
[00:03:43] in the bark naturally reduces the risk of insect damage
[00:03:47] and microbial infection. The three insect mechanisms are interlinked,
[00:03:51] allowing Metasequoia to firmly root in the intertidal zone
[00:03:54] . It stands firm against tides, wind and rain
[00:03:58] .
[00:04:02] This amazing survival wisdom. Its long
[00:04:05] epic began about 100 million years ago in the Early Cretaceous
[00:04:09] period.
[00:04:12] At that time, Metasequoia was a large family distributed throughout the Northern Hemisphere
[00:04:16] , until about 2.5 million years ago, when the Quaternary glaciation
[00:04:19] arrived, and they successively became extinct
[00:04:23] in Europe, North America and other places
[00:04:24] .
[00:04:27] Scientific surveys confirm
[00:04:31] that there are still wild Metasequoia distributed, but the number is very small.
[00:04:34] The number of wild plants is less than 1,000 . Southern
[00:04:38] China is their most important survival sanctuary
[00:04:41] on Earth. As a survivor of ancient times
[00:04:45] , Metasequoia has witnessed Earth's geological, climatic
[00:04:49] changes, and biological evolution history , and is a true
[00:04:53] natural living fossil . However
[00:04:56] , its fate has not been so stable. Due
[00:05:00] to its poor natural renewal ability , coupled with severe insect damage
[00:05:03] and human activity interference, there are less than 300
[00:05:07] ancient Metasequoia trees over a hundred years old in the country. And this alpine wetland
[00:05:11] in Pingnan
[00:05:40] , in other parts of the world, Metasequoia is rarely seen scattered.
[00:05:44] Why is Pingnan the only sanctuary
[00:05:47] for this branch of life ?
[00:05:51] All this is due to the special protection of nature. The mountains
[00:05:55] surround a deep and secluded valley, like
[00:05:58] a natural barrier blocking cold currents, stabilizing the
[00:06:02] average annual temperature in the area at around 15 degrees Celsius
[00:06:05] . Groundwater continuously gushes out, moistening
[00:06:09] The altitude of 1200 meters
[00:06:12] also allows it to escape the heat
[00:06:16] in the steaming southern mountains. All possible survival conditions
[00:06:20] are met here, collectively creating this
[00:06:23] rare vitality. However, even in
[00:06:27] this blessed haven , Metasequoia still faces
[00:06:31] severe challenges. Although its vitality is tenacious,
[00:06:35] it is difficult to reproduce smoothly in the natural environment
[00:06:38] .
[00:06:40] The clues are hidden within.
[00:06:52] Protect the tree from freezing
[00:06:55] . But this also exposes its fragility
[00:06:58] and extreme sensitivity to the environment. The growth of
[00:07:02] Metasequoia, whether it is seeds, flowers, or seedlings , is very sensitive
[00:07:06] to environmental factors .
[00:07:08] And then or the temperature.
[00:08:12] Relying solely on natural reproduction, Metasequoia can hardly achieve population renewal
[00:08:16] . For this ancient forest to continue, someone must
[00:08:20] reach out .
[00:08:23] Artificial cultivation has become the key to continuing the population
[00:08:26] . These carefully collected cones and seeds will be
[00:08:30] sent to the state-owned forest farm's seedling base. After
[00:08:34] scientific cultivation, they will grow into healthy seedlings
[00:08:37] . Currently, we have collected
[00:08:40] nearly 200 copies
[00:08:45] of Metasequoia seed resources. There are 3,000 grafted seedlings, and the grafting survival rate is as high
[00:08:49] as 90%. At the same time, the first Metasequoia
[00:08:53] living gene bank in the country has been established. Artificial
[00:08:57] propagation has solved the problem of Metasequoia reproduction, and
[00:09:00] scientific monitoring and in-situ protection of wild ancient Metasequoia communities
[00:09:04] are also being promoted simultaneously
[00:09:06] .
[00:09:10] Tighten it a little.
[00:10:11] Someone is dedicated to protecting every fragile seed.