Large amount of capital outflow from XL orders

$CROSSTEC (03893.HK)$
Capital Tracking tool shows capital outflow of 40M~ from XL orders (16 Dec 21). The majority of buyers are from S orders.

The shareholders who made the XL orders needed to have held on to a large amount of the stock before in order to have executed such big orders to sell. There may be reasons to why so much capital from XL orders have flowed out.