Operator
Operator
Good morning and good evening ladies and gentlemen. Thank you, and welcome to 21Vianet Group's Fourth Quarter 2019 Earnings Conference Call. At this time, all participants are in a listen-only mode. We will be hosting a question-and-answer session after Management's prepared remarks.With us today are Mr. Alvin Wang, Chief Executive Officer and President; Ms. Sharon Liu, Chief Financial Officer; and Ms. Rene Jiang, Investor Relations Director of the company.I'll now turn the call over to the first speaker today, Ms. Rene Jiang, IR Director of 21Vianet. Please go ahead, ma'am.