Has been removed from the shelves. According to the inquiry of Qixinbao, "Lingtongtong" is a trademark brand of Xuzhou Muyan Education Consulting Co., Ltd. The company was established in 2017 with a registered capital of 1 million yuan. It was canceled on November 24, 2020. In response to the company being questioned for spreading unethical ideas, the Quanshan District Market Supervision and Administration Bureau has set up an investigation team to conduct an in-depth investigation.