The first Asia manufacture of airtight tent, since 2006 

How did the partners speak of KaiCheng?
Dongguan KaiCheng Outdoor Products Co., Ltd. upholds a spirit to be down-to-earth and fearless in the development. Now we have many honors and certifications. KaiCheng is located in a place with traffic convenience. There are highways, railways, and airports. With a focus on customers, KaiCheng analyzes problems from the perspective of customers and provides comprehensive, professional and excellent solutions. KaiCheng improves production efficiency by introducing advanced production equipment at home and abroad. We guarantee product quality based on a complete quality and production management system. We are able to provide quality ODM/OEM services for customers.

Why is the sea blue? why can't it be purple? Sea water is the same as ordinary water,They are all colorless and transparent.Ocean color is determined by the optical properties of the sea water and the suspended substances contained in the sea water, the depth of the sea water, the features of the clouds and other factors.You know,The sun is composed of seven colors: red, orange, yellow, green, green, blue and purple,These seven colors of light,Different wavelengths,From red to purple,The wavelength gradually became shorter,The penetration capacity of long waves is strongest,Most easily absorbed by water molecules,The penetration ability of short wave is weak,Reflection and scattering are easy to occur.Seawater also has different degrees of absorption, reflection and scattering of light at different wavelengths.Long red light, orange light, yellow light,After shooting the sea,As the depth of the ocean increases, it is gradually absorbed.Generally speaking,In an ocean with a water depth of more than 100,The Eve

How many fish tank filters? Top filtering is also called upper filtering,Is the most basic way to filter,Simple operation,Convenient,Use a submersible pump to pump water into filter materials such as biochemical cotton and biochemical ball,After layers of filtration, it is left in the fish tank,Suitable for various fish tanks,Filter size can not be too large,Otherwise, the beauty of the fish tank will be affected.As the name implies, the filter equipment is at the bottom of the cylinder,Generally speaking, the bottom sand, magnetic ring, etc. are placed on the filter board,Oxygen-containing water passes through the bottom sand gap,There are more beneficial bacteria on the bottom sand,The purification effect is obvious,Generally speaking, the bottom filter takes up a large space,The operation is more complicated.At the same time, it may cause the bottom sand to block the filter channel,Water short circuit and water and fertilizer loss.It is mainly to sink the filtration device into the water,The filte
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