In June 2010, we entered into an agreement to underwrite the Cordlife’s rights issue which amounted to AUD11.6 million. On July 4, 2010, we terminated the underwriting agreement and were released from such obligation but continued to participate in the rights issue and took up our share entitlements on a pro-rata basis. The rights issue was completed on July 26, 2010 and we subscribed for 6,841,666 shares of Cordlife at a total cost of approximately AUD2.0 million. Prior to the restructuring of Cordlife, Cordlife was a provider of cord blood banking services with operations in Singapore, Hong Kong, India, Indonesia and the Philippines. After the restructuring, developing cord blood banking businesses in Indonesia, India and the Philippines were operated under LFC, which was listed on the Australian Securities Exchange, while the more mature cord blood banking businesses in Singapore and Hong Kong were operated under Cordlife Singapore, which was listed on the Singapore Exchange on March 29, 2012. After the restructuring of Cordlife, we hold 24,366,666 shares in LFC; Cordlife Singapore was listed on the Singapore Exchange subsequently on March 29, 2012, and we hold 24,366,666 shares in Cordlife Singapore. In June 2013, Cordlife Singapore completed the acquisition of the cord blood and cord tissue banking businesses in Indonesia, India and the Philippines from LFC. After the acquisition, Cordlife Singapore operates cord blood banking businesses in both mature markets such as Singapore and Hong Kong, and developing markets such as Indonesia, India and the Philippines. Cordlife Singapore also acquired Stemlife, a Malaysia-based cord blood banking operator. In December 2013, LFC acquired an unlisted company which engaged in the provision of funeral and related services, and thereafter, LFC’s principal activities changed to the provision of funeral and related services. LFC’s issued share capital was consolidated on the basis that each parcel of three shares held by a shareholder was consolidated into one new share. After the share consolidation, we owned a total of 8,122,222 shares in LFC. In November 2014, we acquired 1,150,000 shares in Cordlife Singapore. In February 2018, we disposed of all of our shares in LFC. As of March 31, 2021, we owned 25,516,666 shares in Cordlife Singapore, which represents approximately 10.0% equity interest. Our total investment in relation to Cordlife, Cordlife Singapore and LFC combined up to the date of this report amounted to RMB66.4 million, converted into RMB using the currency exchange rate as of March 31, 2021.
In September 2010, we announced the execution of a framework agreement to form a non-wholly owned subsidiary, Lukou, with the Zhejiang Provincial Blood Center. The new entity which completed business registration and regulatory approval procedures in February 2011, is 90% owned and controlled by us.
In November 2010, we completed a follow-on public offering of 7,000,000 shares at US$4.50 per share. Total gross proceeds of US$31.5 million raised are being used in building out our Zhejiang operation and for general working capital purposes.
In December 2010, we completed a warrant exchange offer to simplify our capital structure, which allowed warrant holders to receive one ordinary share for every eight warrants outstanding. We issued an aggregate of 1,627,518 ordinary shares upon closing of the warrant exchange offer, equal to approximately 2.2% of shares outstanding as of December 10, 2010, in exchange for 13,020,236 warrants. Any remaining warrants outstanding that were not exercised expired on December 13, 2010.
On April 27, 2012, we completed the sale of US$65 million in aggregate principal amount of 7% senior unsecured convertible notes, which notes were convertible into ordinary shares at a conversion price of US$2.838 per share to BCHIL. On August 26, 2015, BCHIL transferred the convertible notes to Excellent China Healthcare Investment Limited (“ECHIL”). On the same day, Magnum Opus 2 International Holdings Limited (“Magnum 2”) acquired from BCHIL the convertible notes through acquisition of all the issued and outstanding shares of ECHIL. On January 4, 2016, Golden Meditech acquired from ECHIL the convertible notes and subsequently transferred the convertible notes to GM Stem Cells. In April 2017, GM Stem Cells converted such convertible notes and we issued 22,903,454 ordinary shares in exchange for the cancellation of the convertible notes.
In August 2012, we entered into a share purchase agreement with Cordlife Singapore in which we agreed to sell to Cordlife Singapore, and Cordlife Singapore agreed to purchase, 7,314,015 of our ordinary shares for a total purchase price of approximately US$20.8 million. Contemporaneously, CSC South entered into a shares repurchase agreement with Cordlife HK to repurchase the 10% of its shares held by Cordlife HK for approximately US$16.8 million. Upon completion of the transactions on November 12, 2012, Nuoya became our indirect wholly owned subsidiary and Cordlife Singapore acquired 7,314,015 of our ordinary shares, representing approximately 10% of our issued ordinary shares as of the closing date. Such 7,314,015 ordinary shares were subsequently acquired by Golden Meditech in November 2015.