Generally it is steamed open on high heat, steamed for about 15 minutes on medium heat, and then turned to low heat to steam for about 1.5 hours. Steaming for 40 minutes is also edible, but the texture is not good, not too soft and sticky, so it is recommended that you steam for 1.5 hours. It doesn't hurt to steam a little more water to avoid drying out the pot. But also according to the amount of meat to adjust the time of steaming ha!