In Grand Theft Auto V, Hao challenges Franklin to a street race against him and his friends. Following the race, the player can join four more street races around the city. He also has a brief appearance during the mission Father/Son, when Franklin takes Amanda De Santa's car to Los Santos Customs. Here, Hao fixes Amanda's car.
If Franklin purchases the Los Santos Customs on Route 68, south of Sandy Shores in Harmony, Hao will send Franklin an email shortly afterwards. In it, Hao talks about Franklin buying the shop, and asks Franklin not to make Hao call him "boss", which is strange because Hao works in a different garage. Hao also expresses a dislike for Lamar Davis, as in his email he refers to Lamar as a "shit-talker".
Hao's dialogue in Father/Son will vary depending on Franklin's performance in the street races. If Franklin won the last one he did, Hao will vow to win the next one. If Franklin lost, Hao will taunt Franklin about the loss. If Franklin hasn't participated in one yet, Hao will encourage Franklin to do so.
Hao can be killed while inside Los Santos Customs. Just like other mechanics, he will respawn if he dies.