southern/south
1.My hometown is in the northern China.
2.My hometown is in the north part of China.
3.My hometown is in the nornthern part of China.

Which one is correct?

Question

southern/south
1.My hometown is in the northern China.
2.My hometown is in the north part of China.
3.My hometown is in the nornthern part of China.

Which one is correct?

Answer

2 and 3 are correct. Just double check your spelling. It should be "northern."

Answer

Number 3 is correct. 
My hometown is in the northern part of China.

Answer

3 is ok (if you correct the typo in northern) but not 1 or 2.

However, the most natural-sounding options (at least to me - I'm from the UK) would be "I'm from northern China" or "I'm from the north of China".