You can open an osshore a/c in Chinese mainland even in Europe for your HK company.
Open an offshore a/c is easy but it will take some time, the procedures of bank need about 2 weeks.
You should bring the followings documents with you when opening the a/c:
1. Company Registration Certificate, Business Registration Certificate;
2. Incorporation Form (NC1);
3. Memorandum & Articals of association
4. Your passport or ID card;
5. Company chop;
6. If your company have established for more than 1 year, the lastest Annual Return form (AR1) is must.
For further information, you can inquire to the bank or us.