The telephone number of China Construction Engineering Office is 400-885- 1687.

The telephone number of the sales department of Hainan Channel is 0898-68520657.

The telephone number of Guangdong Channel Sales Department is 020-2230 1783.

The main difference between the factory direct dial telephone and the sales department contact telephone number is:

Factory direct dial telephone is generally a sales consultation telephone directly provided by the manufacturer, which can consult product information and purchase matters. The contact telephone number of the sales department is a telephone number provided for the sales department in a certain area, which is generally used to consult the sales policy, price, after-sales service and other related information in this area. It should be noted that the telephone numbers provided by sales departments in different regions may be different due to different channels, different sales strategies, different product lines and other factors.

Besides telephone contact, online consultation and purchase can be conducted through Nippon official website to obtain more comprehensive and accurate information and quotation.