You said that ‘what we often use is Chinese.The Han nationality is also the most populous nation in China.Then there are many dialects in Chinese. As we often say, northern dialect and southern dialect. Then the most representative northern dialects are Northeast Dialect, Shaanxi Dialect and Henan Dialect. The most representative southern dialects are Sichuan dialect, Guangxi dialect and Cantonese. These dialects represent the common sayings in different regions.But for us, we all use Mandarin in our daily communication.’ I love the Chinese mandarin so much. I started studying it some time ago. I look forward to speak it fluently soonest. Best regards and success in the engagement.