Le Le, the younger twin who received a heart transplant, receives one of his regular checks at Wuhan Union Hospital in Wuhan, Central China’s Hubei province. (Photos by Zhang Wei/for chinadaily.com.cn)

Huan Huan, the twin, laughs after his grandmother came to visit him at Wuhan Union Hospital in Wuhan city of Hubei province.

Huan Huan, the elder twin, gets a medical check at Wuhan Union Hospital on Aug 1, 2019 in Wuhan of Hubei province.

Huan Huan, the twin, laughs and holds a toy in his ward at Wuhan Union Hospital, Wuhan city of Hubei province.