You can't sign legal documents directly when you are not in the local area.
Power of attorney, authorizing local trustworthy personnel to act as agents. Send a fax, or send a photo email authorization.
Lawyer Li of Shandong Law Firm (office building 1 105, No.7 City Plaza, Sunshine 100, Kuiwen District, Weifang City, Shandong Province, e-mail ljbotong @ 163.com, 0536-833 163).