Tong Si Hung

Tong Si Hung is the owner of a club called The Hive in Deus Ex: Human Revolution.

Background
Tong is a Triad boss and the owner of The Hive, a Heng Sha nightclub frequented by augmented people. He often impersonates a VIP lounge bartender to screen people who seek an audience with him. During the second trip to Hengsha (if the player has the Explosive Mission Pack) it is revealed that he is Tracer Tong's father.

After reaching Heng Sha, Jensen finds that his quarry is a hacker named Windmill, who has gone to ground with the aid of Tong. He then travels to the Hive to meet with the Triad boss to get the Dutchman's location.

Jensen can ask to speak with Tong directly, in which case he will meet with an aged floor manager. Though snarky and dismissive, if Jensen is persuasive enough, the manager agrees to let him speak with Tong. Jensen then goes to Tong's office only to find that the bartender is actually Tong himself. Tong then gives Jensen van Bruggen's location after some questioning.

Or, Jensen can infiltrate the Hive and crawl through the ventilation system. One vent overlooks Tong's office, and there Jensen will come across a meeting between Tong and a Belltower commander, Zharkari Khan, who demands van Bruggen's location. Though Tong pretends to not know who the hacker is, after Khan leaves, Tong quickly makes a phone call to tell Windmill to stay put at his current hiding place of Alice Garden Pods.

When next Jensen returns to Heng Sha, he is tracking a GPL implant belonging to one Vasili Sevchenko. He follows the signal underground into deep Harvester territory, where eventually he comes across none other than Tong again, who is now equipped with Sevchenko's augmented arm.

Tong actually does not know where the kidnapped scientists are, as he was only given Sevchenko's corpse by Belltower, who frequently bribes the Triads with augmentations in exchange for their continued cooperation. However, Tong has no love for Belltower, and agrees to aid Jensen in his quest, directing him to stow aboard one of Belltower's ships at a nearby dock, and providing him with explosive ordnance to use as a distraction.

Once Jensen sets off the explosives, he finds that the distraction also served to cover Tong's son, Tracer's, escape from Heng Sha.