SinceApple iPhone8/iPhone8 Plus was officially released, "bursting" incidents of the new phones have occurred one after another. Yesterday, it was reported that two new cases of panel cracking on iPhone 8 series were reported in the United States. The much-watched "Apple Cracking Gate" incident is continuously escalating, while many real safety issues of the "Cracking Gate" related to security doors are quietly happening around us.

As an indispensable part of modern home decoration, security doors shoulder the important responsibility of protecting family life and property safety. However, this crucial component frequently encounters various problems, causing great troubles to users.

The following are complaint messages from the home improvement platform under Alibaba:

Mr. Shi from Shanxi reported that the frame of his installed security door would get loose every one to two months. After locking the door, the door felt loose when pulled by hand, and there would be collision noise between the door and the frame when the wind blows. It has been repaired five times in one year and two months since installation.
Mr. Hei from Beijing reported that the handle of his security door was loose, and there was no lock protection plate on the lock strike surface of the door frame, which could directly contact the inside of the wall.
Mr. Zhu, an owner of a residential community in Henan, also reported that the developer forced residents to buy extremely poor-quality security doors.
Mr. Fu from Hunan reported that the frame of his installed security door was distorted and deformed, so the door casing could not be installed at all.
Mr. Huang from Sichuan also reported problems with his newly purchased security door during installation. The gap difference between the top and bottom after door closing is at least 5mm. Besides, there are repair marks on the door frame, inconsistent paint color, and holes on the door leaf, which are obvious signs of inferior products.

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Therefore, to solve these problems from the source, selecting a proper security door has become a big confusion for many families.

So how to choose the "right" security door?

Regardless of brand and market popularity, the general steps for selecting security doors are basically the same when starting from quality inspection:

1、When purchasing a security door, you shall ask the seller to present the corresponding Inspection Certificate of Conformity and check whether it meets the technical requirements of national mandatory standard GB17565—1998.

2、Pay attention to checking the internal structure of the door body. You may remove the peephole, doorbell box or lock handle for inspection. There shall be several reinforced steel bars inside the door body to organically connect the front and rear panels. The filling material inside the door is preferably asbestos material with fireproof, thermal insulation and sound insulation functions.

3、Check whether the lock adopts the special anti-theft lock inspected and approved by the public security department, and whether there is reinforced steel plate protection at the lock installation position.

4、Check the product workmanship, including welding defects and whether the cooperation between door leaf and door frame is tight.

5、Weigh the security door. A standard qualified security door shall weigh no less than 40 kg.

6、Then comprehensively consider the brand and market popularity of the security door, which represents better reputation and after-sales service, providing certain guarantee for consumers' follow-up services.

As a responsible security door manufacturer, we hope every customer will not encounter the above-mentioned problems and enjoy excellent customer experience. This is the sincere aspiration of every member of Longchuan.

"At Yanmen Pass, solid as an impregnable fortress"