Gene chip and gene detection device

A gene detection device comprising:

• a gene chip;
• and
• a bead coated with a fluorescent material,
• wherein the gene chip comprises a substrate and at least one positioning device fixed on an upper surface of the substrate,
• wherein the at least one positioning device comprises a receiving cavity configured to receive the bead,
• wherein the receiving cavity is arranged on a surface of the at least one positioning device facing away from the substrate,
• wherein a cross-sectional area of the receiving cavity decreases in a direction toward the upper surface of the substrate,
• wherein the bead is fixed in the receiving cavity,
• wherein each of the at least one positioning device of the gene chip comprises a plurality of positioning blocks spaced apart, and
• wherein the plurality of positioning blocks are in a circle to form the receiving cavity.