No need for the sniper case, so you can drop it. Check your map to find a sewer hole with an exclamation mark. Turn south and run straight until yu find a wrecked car and a sewer hole. Go down the hole and pick up the rat poison. Continue south till you see a large ladder with a guard near it. Hide behind the big column behind the sewer hole. Wait for the guard to come near the sewer hole and turn his back to you then take care of him. Drop his body in the sewer hole and take his clothes. Go to the huge building with cars in front. Enter to the centre where the red dragon and blue lotus negotiators are. Wait for them to talk then poison the tea. Run to the exit past the two blue lotus guards. When the red dragon negotiator drinks tea he will die instantly. Wait in front of the tunnel till a message appears that objective status updated. Run into the tunnel and you will be awarded a silent assasin rating.
The Wang Foo Incident:
Run in the right street and enter the small allays to the left. There is a sewer hole in one and a guard facing you in the other. Wait behind the trash container. When the limo driver comes to pie in the allay near the sewer hole take care of him then drop his body in the sewer hole and take his clothes. Now you can enter officially. When you pass the main gate go to the left door. There are restrooms in there. A target will come to pie. When he does kill him and return to the round entrance. Go to the double door guarded by two guards. It leads to two stairs that go up to the second floor. Turn right and go in the double door but make sure the guard patrolling the room doesn't see you. Go left through the first door. In there you can find a bomb and a guard uniform. Take the bomb and exit through the other door in the room. Go left and down the ladder. Place the bomb in the limo. Run to the end of the street the way the limo is going to move. Where two blue lotus members are standing. Get out the bomb detonator and wait for the limo to approach the two guards then press the detonator. All four targets will be dead. Return back to the ladder and climb it then to the room to your right. Change the clothes. Head for the eating room. Take care of the two targets eating in the room. Head for the exit marked on your map.
The Seafood Massacre:
Run straight then right through the allay. You may drop the sniper case because you wouldn't need it. Then left past the car to other side of the streets and enter the allay to your right. There are stairs that go down. Lock pick the door at the bottom and enter then take the right door and change clothes into a chef and then exit the basement. Go north tthrough the streets and you will find the red dragon negotiator in the alley near a sewer kill him and drop him in the sewer then take his amulet and his clothes if you want to enter the restaurant officially. They will take your weapons at the entrance. Now go back to the basement where you got your clothes to the north of it there is sewers with rat poison in ti. Take the poison then head back to the basement. The police in front of it shouldn't suspect you. Sabotage the gas control and enter the next room ready your syringe and sneak behind the door and look through the keyhole. Wait for the chef to enter then follow him and paralyze him and take his key then go to the kitchen entrance at the right of the van enter the kitchen wait for the door to close then poison the drinks and pick the serving tray and place it on the counter. Ring the kitchen bell. Follow the bartender but make sure he doesn't see you. Crouch behind the couch in front of the door. Wait for the bartender to descend the stairs then go and place the amulet on the table and take the blue lotus negotiator clothes. Exit from the door you came from. You can talk to the bartender and take the toilet key from him. But this is another approach to the mission. Go back to your car with exit near it.