### Chinese: 没想到当年看不起晶圆制造服务的巨头，如今却也要开始做晶圆代工。
### English: I didn't expect the giants who looked down on wafer manufacturing services in those days to start wafer foundry now.
### Errors: There is a major error of wrong grammatical register (eg, inappropriately informal pronouns). internal inconsistency (not related to terminology) at "I didn't expect". There is a minor error of incorrect translation is missing content from the correct translation at "the giants".

### Improved English: Unexpectedly, the giant that looked down on wafer manufacturing services back in the days will also start to do wafer foundry now.