This is the 844th most frequent Chinese word.
內地
"Mainland" or "inland."
In this sentence, '內地' refers to 'mainland China,' differentiating it from regions like Hong Kong or Macau.
香港旅客经常到內地旅游。
Hong Kong travelers often travel to mainland China.
Here, '內地' signifies 'mainland China' contrasted against the specific administrative regions of Hong Kong and Macau.
随着发展，內地与我国港澳地区的交流越来越多。
With development, the interactions between the mainland and the Hong Kong and Macau regions of our country have increased.
The usage of '內地' in this context emphasizes the economic focus on mainland China and its distinct development path.