Mao and friends return to Yang Spring Restaurant. When Shirou serves a dish to a customer without permission, the customer becomes enraged, and Mao offers to serve whatever dish the customer would like. The customer demands he cook a dish using three different types of eggs, and Mao serves shumai prepared according to the customer's demands. Impressed by the dish, the customer makes another unexpected demand. He is Dim Sum Master Xie Lu, and he challenges Mao to a cooking battle...
A smokeless charcoal cooks 
from the inside out.
.الفحم عديم الدخان يطهو من الدّاخل إلى الخارج
Eine rauchfreie Holzkohle kocht
ihn von innen nach außen.
Un carbón sin humo cocina
de adentro hacia afuera.
Un carbón sin humo cocina
de dentro hacia fuera.
Le charbon ne faisant pas de flammes,
la chaleur se propage sans rien brûler.
I carboni ardenti cuociono dall'interno verso l'esterno.
Dá para cozinhar de dentro pra fora
usando um carvão que não solta fumaça.
Бездымный уголь приготовил всё изнутри!