Packaging container

A packaging container comprising:

• a body plate defined into a front face and a back face by a first folding line, wherein the front face includes a second folding line and a third folding line on two sides thereof, wherein the second and third folding lines define two connection portions, wherein the body plate further includes an enclosing plate on another side of the front face, wherein a fourth folding line is located between the front face and the enclosing plate, wherein the back face is folded upwards along the first folding line, wherein the connection portions are folded inwards along the second folding line and the third folding line, wherein surfaces of the connection portions are coated with an adhesive and the connection portions are stuck to the back face, wherein a first pre-folding line and a second pre-folding line are located between the second folding line and the third folding line in parallel, wherein the first pre-folding line includes two tearing lines on two ends thereof, wherein the second pre-folding line includes two tearing lines on two ends thereof, wherein the enclosing plate has a first end and a second end, wherein the first and second prefolding lines are intermediate and spaced from the first and second ends of the enclosing plate, wherein a third pre-folding line and a fourth pre-folding line are located on the front face between the first and fourth folding lines in parallel, wherein the first pre-folding line is closer to the first end of the enclosing plate than the second pre-folding line is to the first end of the enclosing plate, wherein the first pre-folding line is spaced from the first end of the enclosing plate by a first distance, wherein the second pre-folding line is closer to the second end of the enclosing plate than the first pre-folding line is to the second end of the enclosing plate, wherein the second pre-folding line is spaced from the second end of the enclosing plate by a second distance, wherein a fifth pre-folding line and a sixth pre-folding line are located on the back face in parallel to the first folding line, wherein a seventh pre-folding line is defined to connect a first end point of the first folding line to an intersecting point where the first pre-folding line intersects the fourth pre-folding line, wherein another seventh pre-folding line is defined to connect the first end point of the first folding line to an intersecting point where the first pre-folding line intersects the fifth pre-folding line, wherein an eighth pre-folding line is defined to connect a second end point of the first folding line to an intersecting point where the second pre-folding line intersects the fourth pre-folding line, wherein another eighth pre-folding line is defined to connect the second end point of the first folding line to an intersecting point where the second pre-folding line intersects the fifth pre-folding line, and wherein two opposing seams are defined on the first folding line.