According to the relevant data, Tianjin Binhai Bai Tong Century Training Co., Ltd. is a liar, because according to the data, Bai Tong Century Medical Training Institute made a false promise when enrolling students, saying that there are only two expenses, one-time expenses, and no other expenses for follow-up. The first tuition fee is 3580 yuan, and the second application fee is about 1000 yuan, which is repeated. The one-time fee is purely fictitious.