Training institutions are afraid of 123 15. Training institutions will be more worried about 123 15 (complaint hotline of China Consumers Association). 123 15 is a hotline for consumer rights protection in China. Consumers can call 123 15 to complain and report unreasonable business practices and product quality problems. For training institutions, if there are problems such as service quality, fraud and false propaganda, consumers will call 123 15 to complain, which will lead to the risk of being investigated, punished or damaged. 12345 (China government public service hotline) provides service complaints and consultation, but it covers a wider range of government public services, including transportation, medical care, environment and other fields, rather than a specific complaint channel for training institutions. Therefore, training institutions are more afraid that consumers will complain about their problems through 123 15.