1."louyang at the east noodles of the state"(the two sides connect )2."South side of Guangzhou at Wuhan"(the two sides don't connect )3. All things did you take together ?
在。。。内部的东面: in the east of 在。。。外部的东面(接壤): on the east of 在。。。外部的东面(相隔一段距离):to the east ofTaiwan is in the southeast of China. In the east of China is/lies Shanghai. On the east of Shanghai is the East Sea. Japan is/lies to the east of China. Korea is to the northeast of China.
in, to, on表示“位于”。in表示在某范围之内; to表示在某范围之外; on表示“邻”、“接壤”。Shanghai lies in the east of China. 上海位于中国东部。Japan lies to the east of China. 日本在中国东部。Mongolia(蒙古国)lies on the north of China. 蒙古人民共和国位于中国北部。