Hunter Biden’s business associates are gearing up to testify behind closed doors at the House Oversight and Judiciary committees later this week as part of the House impeachment inquiry against his father, President Biden.

First up is Mervyn Yan, who was subpoenaed by the House Oversight Committee last year for financial records related to his business dealings with Hunter Biden.

Yan worked with Hunter Biden through Chinese energy company CEFC and Hudson West III.

Yan is set to appear before both committees on Thursday for closed-door transcribed interviews.

Next is Rob Walker, who was also subpoenaed last year. He is expected to appear for his closed-door transcribed interviews before both committees on Friday.

Financial records subpoenaed by the committee revealed that members of the Biden family, including Hallie Biden and Sara Biden, received more than $1 million in payments from accounts related to Walker and his Chinese business ventures with Hunter.

Walker worked on a joint venture called Sinohawk Holdings, which was meant to be a partnership with Chinese energy firm CEFC.

Multiple Biden family accounts, including those belonging to Hunter, Hallie Biden and an unnamed Biden, also received approximately $1.038 million from the same Walker LLC account after Bladon Enterprises, which reportedly belonged to Gabriel ‘Puiu’ Popoviciu, a Romanian tycoon, deposited more than $3 million between November 2015 to May 2017. According to a 2017 email from Walker, which was obtained by the Senate Finance Committee, Walker viewed himself as a ‘surrogate’ for Hunter and his uncle, Jim Biden, when ‘gauging [business] opportunities.’

The transcribed interviews with Yan and Walker this week come after the committees announced last week that they had confirmed a new date for Hunter Biden’s closed-door deposition.

Hunter Biden had initially defied a subpoena to appear for a deposition and was at risk of being held in contempt of Congress.

The committees said Hunter Biden’s attorneys confirmed that he would appear for a deposition on Feb. 28, thus pausing all contempt of Congress proceedings.

Hunter Biden’s deposition will come after his business associates share testimony with the committees.

The House Oversight and Judiciary committees plan to hear testimony from other Hunter Biden business associates like Eric Schwerin on Jan. 30, Tony Bobulinski on Feb. 5, and more.