Heng and ha are two words that refer to the sounds people make when they are carrying heavy things. They are often used by people who work together to move heavy objects, like furniture or boxes.
Heng means to take a deep breath in and ha means to push the air out. When someone says "heng," they are lifting the heavy object and taking a big breath in. When they say "ha," they are pushing the heavy object and letting the air out.
It's like when you blow up a balloon. You take a big breath in (heng) and then blow out the air (ha) to make the balloon bigger. When people say "heng" and "ha" together, they are working together to move something heavy just like how you work together with your friends to play games or build forts.
Heng and ha are also used in some martial arts like Tai Chi. In Tai Chi, heng is used to gather energy while ha is used to release it. It's like when you take a deep breath before doing something important, and then let that energy out when it's time to act.
Overall, heng and ha are just two sounds that people use to coordinate and work together to move heavy things or to focus and release energy in Tai Chi.