C22 Blood group mismatch
"I'm Xu Yang, Xiao Qiu's best friend in the orphanage." The other side sent another message very quickly.
"Xu Yang?" Han Chuyan frowned as he muttered the name. When Xu Xiqiu was living in his house before, he had heard her mention this name to her brother, which dispelled his suspicions.
The next second, he pressed the touch-screen keyboard and sent another message