The girl did have a big smile while "敲響了BQ鑼". As for the screengrabs, hard to say what exactly they convey. Many people cry after acheiving their goal, and more slouch, or even collapse, after finishing a marathon, but I'd think most of them are happy and proud.
I'm definitely not saying kids should be coerced into doing marathon. I just don't think parents who have kids running marathon should automatically be condemned. They most likely love their own kids way more than a stranger loves their kids. They probably have a happier and healthier family than most people who throw stones at them. They might just have different understanding and thresholds on human physiology and limitations. We don't know them and we don't know their situations. Let CPS do their investigation.
Here is an example of a child marathoner who grew up a healthy and caring human being. In 2013, there was this headline (so different from today's world): 9 Year Old Marathon Runner Has Some Pretty Cool Parents
And where is that kid today (19 in 2023)? Well, see for youself: https://www.niktoocheck.com/about
Here are some exerpts:
"He ran his first 5k at the age of five and his first marathon at the age of nine.. He is currently the youngest person to run a marathon in Antarctica, which he did at the age of nine. Toocheck completed his goal [of running a marathon in each of the 50 states and Washington, DC] and set the new world record at 14. He currently holds the record as the youngest person to run a marathon on all seven continents and in each of the 50 states. Nik created a philanthropic campaign called Running the World for Children. He set a goal to raise money and awareness for Operation Warm, a non-profit organization that his grandfather founded in 1998."
And to this day? He's apparently still doing his philanthropic pursuit through "extreme" activities.