First of all, the mobile phone can receive the signal, and there are mosques mentioned later, at least it can explain that it should not be in a place like no man’s land, and the climate cannot be extremely dry. Reference (Arid and semi-arid area sandy irrigation (arbor) wood species moisture dynamic relationship and its application), generally wet sand layer appears at 40cm; also note that mobile phone signals will be attenuated due to obstacles, refer to ( https://mp .weixin.qq.com / S? __ BIZ = MzA3MTA3OTIwMw == & MID = 2,652,511,935 & IDX = 1 & sn = 1a0a995d0fb560cfee723d0377d1b251 & chksm = 84ddbaf3b3aa33e55d24cd5aa9d99e80b982e6624d9c60cd460197bc0c5580b26babfa7af163 & mpshare = 1 & SCENE = 1 & SrcID = 0808FEW8fqlEUYBCBg0GNOUV # RD ) laminates / plywood signal attenuation but damp up to 20db in 5db, visible The water in the medium will greatly attenuate the signal. Combined with the mobile phone signal in the field, it is about -70db. The top of the coffin should be soil or wet sand and it should not be too thick, otherwise the mobile phone will not have a signal; in addition, a little bit of sand is not seen from the lens of the snake back hole. It can also show that the coffin is buried between the wet sand layer and the dry sand layer; the sand leaking out of the third roof plate also proves that the top of the head is a layer of dry sand; on the whole, the coffin is not buried deep, it is too much for the first meter. So, I just made a hole in the coffin and went out. There are so many things; the kidnappers also provide light sticks, mobile phones and knives, and laborious digging to bury people. Don’t you think it’s an old trick?
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