December 2008, following the first series of 15 new Cayman buses CKZ6116HN3 delivered to Laiwu City, at the end of May 2009, the new Cayman series Hengtong another environmental protection bus CKZ6106 will also be delivered to Laiwu. According to the introduce of relevant person in charge of Hengtong, the reason of Hengtong gas bus is so popular in Shandong, in addition to products have their own unique advantages for environmental protection and energy saving, but also benefit for the establishment of a comprehensive sales service system.

"City bus should choose suitable model, we have conducted an extensive survey for many energy-saving, environmental protection vehicles of various brands to hold an in-depth understanding. Hengtong has good reputation in the field of natural gas bus, combining with the new Cayman series of bus have significant effect of energy-saving and reducing emissions, in line with the requirements of our development." Laiwu a representative of public transportation said.