C626 Homozygous Repulsive Heterosexuality

Ling Feng frowned as he thought about how to solve this problem, but no matter how he thought about it, he couldn't think of a better solution. Was it because the technology on Earth was too backward, or was there a problem with his thoughts!

Ling Feng had been thinking about this problem and didn't notice Ling Er walk in. Ling Er looked at Ling Feng, who was frowning