Qixi Festival , which is a traditional festival, is celebrated on the seventh day of the seventh month on chinese lunar calendar originated from the Han Dynasty
it is mostly correct. 这个讲解七夕情人节的句子没有什麼错误,总的来说是表达重点错误,不如直接用 The bloody sad love story of the cowboy (牛郎) and his stitch girlfriend (织女)来说明好玩一些。 当然 is celebrated 改为celebrates 比较好。